Science Heart

Question 1

____ carries deoxygenated blood from body parts towards the heart

Answer 1

veins

Question 2

Arteries 2 facts.

Answer 2

1. vessels that carry blood away from the heart

2. have thick layer of smooth muscle to withstand pressure from heart beat.

Question 3

gases exchange happens between the ______ and alveoli of lungs

Answer 3

capillary bed

Question 4

erythrocytes (red blood cells) contains protein hemoglobin which

Answer 4

carries oxygen from the lungs to body’s tissues and helps return carbon dioxide from the tissues back to the lungs

Question 5

leukocytes (white blood cells)

Answer 5

immune response and defend the body against diseases

Question 6

platelets

Answer 6

responsible for clotting mechanism

Question 7

veins and arteries connect to tissue by

Answer 7

capillaries which have thin walls

Question 8

lymphocytes help

Answer 8

seek out pathogens in fluid and make antibodies which target pathogens so other cells can destroy them

Question 9

conduction system or internal control

Answer 9

ensures that the heart chambers contract in a coordinated way

Question 10

heart beat starts in

Answer 10

sinoatrial node aka pacemaker. upper wall of right atrium

Question 11

contraction of atria followed by the ventricles is called

Answer 11

systole

Question 12

rest phase when chambers relax and refill

Answer 12

diastole

Question 13

atherosclerosis is

Answer 13

build up of plaque in blood vessels that reduces the flow of blood through the vessel

Question 14

embolus

Answer 14

when plaque or clotted blood traveling through vessels creates blockage