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Biology Paper 1 > Animal tissues, organs and organ systems 3 > Flashcards

Animal tissues, organs and organ systems 3 Flashcards

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1
Q

What is an artery?

A

A large blood vessel that takes blood from the heart

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2
Q

What is a vein?

A

A large blood vessel that RETURNS BLOOD to the HEART

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3
Q

What is a capillary?

A

Blood vessels that joins arteries and veins. Substances pass through capillary walls to and from the surrounding cells

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4
Q

What is the function of the heart?

A

Pumps blood around the body

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5
Q

What is the function of the blood?

A

Carries the blood cells and key molecules around the body

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6
Q

What does the aorta do?

A

carries OXYGENATED blood at high pressure around the body

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7
Q

What does the pulmonary artery do?

A

carries DEOXYGENATED blood to the LUNGS

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8
Q

what do the pulmonary veins do?

A

RETURN OXYGENATED blood FROM the LUNGS

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9
Q

What does the left atrium do?

A

RECEIVES blood from the LUNGS

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10
Q

What does the valves do?

A

Prevent backflow

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11
Q

What does the left ventricle do?

A

Pumps blood around the body

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12
Q

What does the right ventricle do?

A

Pumps blood to the LUNGS

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13
Q

What does the vena cava do?

A

RETURNS blood from the body

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14
Q

What does the right atrium do?

A

Receives blood from the body

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15
Q

How are the atria and ventricles connected?

A

Blood is pumped from the atria into the ventricles and then to the rest of the body

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16
Q

What is double circulation?

A

Blood goes through twice on every circulation

17
Q

What are the characteristics of the arteries?

A

Thick, muscular, elastic wall. Narrow lumen.
They must cope with high pressures of blood, because it has just come from the ventricle

18
Q

What are the characteristics of the veins?

A

one-way valve so that blood flows in one direction only. Thin wall, thin muscles, larger lumen

19
Q

What are the characteristics of the capillaries?

A

Very thin to allow as much oxygen to diffuse as possible. Blood plasma passes through capillary walls

Biology Paper 1 (17 decks)

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