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BIOLOGY GRADE 10 > Transport Systems In Mammals > Flashcards

Transport Systems In Mammals Flashcards

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1
Q

What is a closed blood system?

A

Blood never leaves the blood system

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2
Q

Give the three steps of pulmonary circulation.

A

Heart→lungs→heart

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3
Q

What is the purpose of systematic circulation?

A

To provide tissues with O²

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4
Q

What is the difference between a artery and a vein?

A

Artery - transports blood away from the heart

Vein - transports blood to the heart

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5
Q

Where is the heart found?

A

Mediastium

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6
Q

True or false?

The blood of the right hand side never mixes with the left hand side of the heart.

A

True

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7
Q

What do veins have to maintain the movement of blood?

A

Valves

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8
Q

Give the definition of a portal vein.

A

Vein branches/forms into the capillary network

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9
Q

What is the scientific name for a pacemaker in the heart?

A

SA-node

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10
Q

What node if found above the the right and left ventricle?

A

AV-node

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11
Q

What is systole?

A

Contraction of the heart

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12
Q

What is diastole?

A

Relaxing of the heart

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13
Q

Give 5 facts about atrial diastole

A
  • Heart muscle relaxes
  • Blood enters heart through 2 sets of veins
  • 2 vena cavas (from body) open in the Right Atrium with deoxygenated blood
  • 4 pulmonary veins (from lungs) open in the left atrium with oxygenated blood
  • 0,4 seconds
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14
Q

What muscle of the heart contracts during atrial systole?

A

Muscular walls of the atria contract

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15
Q

What happens to the tri and -bicuspid valves during atrial systole?

A

Tricuspid and bicuspid valves are forced open and blood flows into the Right Ventricle and Left Ventricle

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16
Q

How long doe atrial systole take?

A

0.1 seconds

17
Q

How long does ventricular systole take?

A

0.3 seconds

18
Q

What happens to the muscular walls in ventricular systole?

A

Both walls of the ventricles contract

19
Q

What does the blood pressure in ventricular systole do?

A

BP in ventricles pushes the tricuspid and bicuspid valves closed.

20
Q

What happens to the semi lunar (half moon) valves in the pulmonary artery and aorta?

A

The valves are pushed open

21
Q

Where is deoxygenated blood from the right ventricle forced during ventricular systole?

A

It is forced into pulmonary artery to be transported to the lungs.

22
Q

What type of blood is forces into Aorta from left atrium to be transported to the body?

A

Oxygenated blood

23
Q

What happens when both ventricles relax and why?

A

Both semi-lunar valves of the pulmonary artery and aorta are forced closed to prevent the backflow of blood into the ventricles

24
Q

What is homeostasis?

A

The maintenance of constant internal environment

25
Q

Where does the lymphatic system join the blood system?

A

At the left subclavian vein

BIOLOGY GRADE 10 (6 decks)

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