---
title: The heart and blood — how Mova does on the tests · Biology
description: Lesson 65 of the biology course of Mova's primary school: 6 of 11 tests right, exam 1 of 4, every question with the options, the student's choice, the right answer and why it chose.
---

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# The heart and blood

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**Tests:** 6 of 11 right · **Exam:** 1 of 4 right · **Kind:** ★ · **Understood:** 8 of 15 · **Run:** 2026-10-18, commit `f3c23ea72`

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Lesson 65 of the biology course of Mova's primary school, as Mova's small model took its tests: it had read this lesson and the ones before it and learned from their exercises. Each test shows the options in the order the student saw them, its choice, the right answer, the score of every option and why it chose. The lesson itself, sentence by sentence with trees and pragmatics: [the lesson in the corpora](https://md.mova.elamur.ai/free/en/corpora/school/biology/65-the-heart-and-blood/).

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Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: [the lesson's questions in the corpora](https://md.mova.elamur.ai/free/en/corpora/questions/biology/65-the-heart-and-blood/).

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### Test 1 · ★ · right ✓ {#t1}

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bro, the blood in ur veins is blue till it hits air, everyone knows that

- **1.** No, blood is always red, just darker red without oxygen — **← Mova's choice** · **✓ the right answer** · score 7
- **2.** No, it is green inside the body — no support
- **3.** Yes, it turns red in the air the second you cut yourself, bro — score 5
- **4.** Yes, but only in your arms — no support

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**Why:** It took the question to ask which statement is true. It chose option 1 with score 7, against 5 for the next best. Its support: lesson 65, line 4: «Blood is always red, bright red with oxygen and dark red without, even though veins look blue through your skin.», reached through the remembered sentence the question matched. What matched: the same property (+3); the same doer «blood» (+2); the same light verb (be, have, do, get, go) (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/65-the-heart-and-blood/t1/)

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### Test 2 · ★ · right ✓ {#t2}

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In a cartoon the hero's heart jumps out of his chest shaped like a Valentine card. Put it right.

- **1.** A real heart is a cone-shaped muscle with tubes, inside the ribs — **← Mova's choice** · **✓ the right answer** · score 3
- **2.** Real hearts are square — no support
- **3.** Real hearts can jump out a little way when you are very much in love — no support
- **4.** Real hearts are exactly that shape — no support

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**Why:** It took the question to ask which statement is true. It chose option 1 with score 3, the only option with support. Its support: lesson 65, line 6: «The heart is a muscle about the size of your fist, in the middle of the chest tipped a little to the left, and it beats about 100,000 times a day.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «heart» (+1); the same thing acted on «muscle» (+1); the same light verb (be, have, do, get, go) (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/65-the-heart-and-blood/t2/)

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### Test 3 · ★ · wrong ✗ {#t3}

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What would happen if a valve in the heart did not close properly?

- **1.** The blood would turn blue — **← Mova's choice** · no support
- **2.** Some blood would leak backwards and the heart would work harder — **✓ the right answer** · no support
- **3.** The heart would pump twice as well — no support
- **4.** Nothing at all, valves are not really needed, they are just spare parts — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/65-the-heart-and-blood/t3/)

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### Test 4 · ★ · right ✓ {#t4}

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Before Harvey, people thought the liver made new blood all day. Why could that not be true?

- **1.** Blood never moves at all — no support
- **2.** The heart pumps more blood in an hour than food could ever make — **← Mova's choice** · **✓ the right answer** · score 6
- **3.** The liver is made of bone — no support
- **4.** The liver is far too small to hold any of the body's blood — no support

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**Why:** It took the question to ask why something happens (its cause). It chose option 2 with score 6, the only option with support. Its support: lesson 65, line 13: «In 1628 William Harvey showed that the same blood goes round and round the body, when many people still believed blood was made fresh in the liver and used up;…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «heart» (+4); the same action «pump» (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/65-the-heart-and-blood/t4/)

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### Test 5 · ★ · right ✓ {#t5}

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Kai cuts his finger and it stops bleeding in a few minutes. What did his body do?

- **1.** His blood ran out — no support
- **2.** His heart stopped beating for a few minutes — score 4
- **3.** Platelets and fibrin made a clot that plugged the cut — **← Mova's choice** · **✓ the right answer** · score 8
- **4.** The cold air froze the blood solid — no support

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**Why:** It took the question to ask what is done. It chose option 3 with score 8, against 4 for the next best. Its support: lesson 65, line 14: «When you cut yourself, platelets stick together at the cut and threads of a protein called fibrin form a net that traps blood cells into a clot, which dries in…», reached through the same lesson line as the sentence the question matched. What matched: it fills the role the question asks for (+5); the same action «form» (+4). Against it: a different doer (counts against) (-1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/65-the-heart-and-blood/t5/)

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### Test 6 · ★ · right ✓ {#t6}

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My uncle's a marathon runner and his heart beats slowly when he rests. is that bad??

- **1.** Yes, his heart is getting tired and stopping — score 3
- **2.** No, a fit heart pumps more blood each beat, so it needs fewer — **← Mova's choice** · **✓ the right answer** · score 4
- **3.** Yes, it means he has too little blood — score 2
- **4.** No, it means his heart has stopped growing and has reached its full size — score 3

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**Why:** It took the question to ask which statement is true. It chose option 2 with score 4, against 3 for the next best. Its support: lesson 65, line 17: «The heart gets stronger with exercise and then pumps more blood with each beat, so fit people often have a slower heartbeat at rest.», reached through the option's own match among the sentences about the question's things. What matched: the same action «pump» (+2); the same doer «heart» (+1); the same thing acted on «more blood» (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/65-the-heart-and-blood/t6/)

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### Test 7 · ★ · wrong ✗ {#t7}

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shut up and count it: 20 beats in 15 seconds, what's that a minute

- **1.** 35 beats a minute — **← Mova's choice** · no support
- **2.** 80 beats a minute — **✓ the right answer** · no support
- **3.** 60 beats a minute — no support
- **4.** 20 beats a minute — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/65-the-heart-and-blood/t7/)

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### Test 8 · ★ · wrong ✗ {#t8}

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Why does a giraffe not faint when it lifts its head after drinking?

- **1.** Its strong heart and special blood vessels keep blood flowing to its brain — **✓ the right answer** · score 2
- **2.** It holds its breath to keep blood in its head — **← Mova's choice** · score 3
- **3.** It always drinks lying down — score 3
- **4.** Its brain is in its neck — no support

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**Why:** It took the question to ask why something happens (its cause). It chose option 2 with score 3, tied with another option at 3 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 4, line 14: «Whistling-thorn acacias give ants homes in swollen thorns and sweet nectar, and the ants attack animals that nibble the tree, so both win; when a giraffe keeps…», reached through the option's own match among the sentences about the question's things. What matched: the same action «keep» (+2); the same doer «giraffe» (+1). The right option, 1, scored 2. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/65-the-heart-and-blood/t8/)

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### Test 9 · ★ · wrong ✗ {#t9}

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A van at the shopping centre says «Give blood, save lives». Who might need the blood?

- **1.** People who want to grow taller and stronger — **← Mova's choice** · no support
- **2.** People after accidents and operations — **✓ the right answer** · no support
- **3.** Only vampires in films — no support
- **4.** People who are thirsty — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/65-the-heart-and-blood/t9/)

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### Test 10 · ★ · wrong ✗ {#t10}

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In a video game your health bar refills when red hearts float into you. What really refills lost blood?

- **1.** Hearts floating in the air — **← Mova's choice** · no support
- **2.** Drinking ketchup or tomato juice — no support
- **3.** The bone marrow slowly makes new blood cells — **✓ the right answer** · no support
- **4.** Eating red sweets — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/65-the-heart-and-blood/t10/)

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### Test 11 · ★ · right ✓ {#t11}

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Why does your heart beat faster when you get a fright, even standing still?

- **1.** The body gets ready to run, so the heart sends more blood to muscles — **← Mova's choice** · **✓ the right answer** · score 6
- **2.** The heart is trying to escape — no support
- **3.** Fear makes the blood boil — no support
- **4.** Fright makes the blood turn blue — score 3

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**Why:** It took the question to ask why something happens (its cause). It chose option 1 with score 6, against 3 for the next best. Its support: lesson 65, line 8: «The pulse is the stretch of an artery each time the heart pumps; you can feel it on the wrist or neck, and it gets faster when you run, because working muscles…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «body» (+4); the same light verb (be, have, do, get, go) (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/65-the-heart-and-blood/t11/)

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### Exam question 1 · formal language · wrong ✗ {#e1}

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Identify the origin of the sounds perceived through a stethoscope placed upon the chest.

- **1.** The contraction of the lungs — **← Mova's choice** · no support
- **2.** The closure of the valves of the heart — **✓ the right answer** · no support
- **3.** The flow of blood within the veins of the arm — no support
- **4.** The movement of the ribs — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/65-the-heart-and-blood/e1/)

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### Exam question 2 · formal language · wrong ✗ {#e2}

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Which of the following statements most accurately characterises the colour of human blood within the veins?

- **1.** It is colourless until oxygenated — **← Mova's choice** · score 11
- **2.** It is blue until exposed to air — score 11
- **3.** It is dark red, its apparent blueness arising from the optics of the skin — **✓ the right answer** · score 9
- **4.** It is green owing to its iron content — score 11

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**Why:** It took the question to ask who or what does it. It chose option 1 with score 11, tied with another option at 11 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 53, line 9: «Wild poison dart frogs have poison in their skin, made from the ants and mites they eat, and their bright colours warn predators, which learn the colours and l…», reached through the same lesson line as the sentence the question matched. What matched: it fills the role the question asks for (+5); the same doer «bright colours» (+4); a different action (counts against) (+2). The right option, 3, scored 9. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/65-the-heart-and-blood/e2/)

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### Exam question 3 · formal language · wrong ✗ {#e3}

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Ascertain the principal finding published by William Harvey in the year 1628.

- **1.** The arteries contain only air — **← Mova's choice** · no support
- **2.** Blood circulates continuously around the body — **✓ the right answer** · no support
- **3.** The heart is the seat of thought and of the passions — no support
- **4.** Blood is manufactured afresh in the liver — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/65-the-heart-and-blood/e3/)

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### Exam question 4 · formal language · right ✓ {#e4}

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It is given that a small cut ceases to bleed after several minutes. Select the response consistent with the established facts.

- **1.** Platelets and fibrin form a clot that seals the wound — **← Mova's choice** · **✓ the right answer** · no support
- **2.** The heart ceases to pump temporarily — no support
- **3.** The air solidifies the blood — no support
- **4.** The blood is reabsorbed by the skin — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/biology/65-the-heart-and-blood/e4/)

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- ← previous: [64. Cells, bones and muscles](https://md.mova.elamur.ai/free/en/school-run/biology/64-cells-bones-and-muscles/)
- next →: [66. Lungs and breathing](https://md.mova.elamur.ai/free/en/school-run/biology/66-lungs-and-breathing/)
- ↑ back to [Biology](https://md.mova.elamur.ai/free/en/school-run/biology/)