The Circulatory System(Heart, blood) - Organisation

Question 1

In the HEART, DEOXYGENATED blood enters into the…
(Clue: the ‘r’ in ‘enters’)

Answer 1

Right atrium

Question 2

The process by which the PHLOEM caries dissolved SUGARS from the leaves to the rest to the rest of the plant is called…

Answer 2

Translocation

Question 3

The CELLS in BLOOD are suspended in a fluid called…

Answer 3

Plasma

Question 4

In plants, water and minerals ions are absorbed via the…

Answer 4

Roots

Question 5

What is the name of the organ that releases digestive ENZYMES?

Answer 5

The Pancreas

Question 6

DEOXYGENATED blood is pumped from the —(1)— to the lungs via the —(2)—

Answer 6

1: RIGHT VENTRICLE; 2: pulmonary ARTERY

Question 7

What is a ‘tissue’?

Answer 7

a group of cells with similar structure and function

Question 8

What the chemical used to test for Starch and what are the results?

Answer 8

Iodine
Turns blue-black if present

Question 9

What the chemical used to test for Protein and what are the results?

Answer 9

Biuret

Question 10

Where does DEOXEGENATED blood pass through to get to the lungs?

Answer 10

Pulmonary arteries
(A)teries - away from the heart

Question 11

What are ‘valves’?

Answer 11

Blood valves are flaps that act as one-way inlets for blood coming into a ventricle and one-way outlets for blood leaving a ventricle

Question 12

Which blood vessel has the thickest, most elastic and muscular walls and why?

Answer 12

Arteries
They have relatively thick muscular walls because BLOOD PRESSURE in them is HIGH and because they must adjust their diameter to maintain blood pressure and to control blood flow

Question 13

What is a ‘double circulatory system’ and why do we have it?

Answer 13

A DOUBLE CIRCULATORY SYSTEM refers to a system where BLOOD passes through the heart TWICE for every complete circuit of the body

Question 14

Where does blood pass through to get to the rest of the body?

Answer 14

The Aorta

Question 15

List ALL the parts of the heart and their function

Answer 15

Pulmonary Artery - Heart to lungs
Pulmonary vein - from lungs to heart
Left and Right Atria - into the heart
Left and Right Ventricles - away the heart
Aorta - from lungs to body
Vena cava - body to heart

Question 16

What would happen if the there no platelets in the blood?

Answer 16

The blood won’t clot when there is an injury and could cause the victim to bleed to death

Question 17

How are human red blood cells adapted to their function?

Answer 17

They have no nucleus so as to carry enough oxygen around
They also have a biconvex shape to increae its surface area to take more oxygen

Question 18

What of these is a function of the blood plasma?

Answer 18

Transporting food
Carrying Waste Products
Distributing Hormones

Question 19

What type of cell are phagocytes?

Answer 19

White blood cells

Question 20

Which type of blood vessel has a ‘pulse’ and why?

Answer 20

Arteries
Because they have high blood pressures

Question 21

Which type of blood vessel has valves inside and why?

Answer 21

Arteries - to prevent backflow of blood during high blood pressures

Question 22

Which type of blood vessel carries blood away from the heart?

Answer 22

Arteries

Question 23

What are the cells that controls the resting rate of the heart?

Answer 23

Pacemaker cells - found on the walls of the right atrium

Question 24

What supplies the heart with OXYGENATED BLOOD?

Answer 24

Coronary arteries- branched off the aorta

Question 25

What is the smallest blood vessel?

Answer 25

Capillary - The smallest blood vessels, about 5-10 micrometers in diameter.