Biology - Circulatory System

Question 1

Function

Answer 1

1. Transport substances around the body 2. Transport nutrients absorbed from intestine to all body cells 3. Picks up oxygen from lungs to heart to body cells 4. Carries waste from body cells to heart to lungs out 5. Regulation of body temperature 6. Transport disease fighting white blood cells throughout body

Question 2

Blood

Answer 2

Carries substances throughout body

Question 3

Red Blood Cells

Answer 3

• contain protein called hemoglobin (red) which allows them to transport oxygen throughout body
• make up almost 1/2 blood volume

Question 4

White Blood Cells

Answer 4

Made up mainly of macrophages + leukocytes. Fights off diseases and has nucleus. Makes up less than 1%

Question 5

Platelets

Answer 5

Clots blood; makes up less than 1% blood volume

Question 6

Plasma

Answer 6

Red liquid that carries blood cells along; makes up over 1/2 blood volume

Question 7

Blood Vessels

Answer 7

Tubes carrying blood to or from the heart to the rest of the body

Question 8

Artery

Answer 8

Any of the muscular-walled tubes forming part of the circulation system by which blood is conveyed from the heart to all parts of the body

Question 9

Vein

Answer 9

Any of the thin tubes forming part of the blood circulation system of the body, carrying blood toward the heart (has valves to prevent backflow)

Question 10

Capillaries

Answer 10

The smallest of the body’s blood vessels. They form tube-like structures that have the diameter of a strand of hair so that nutrients can get in

Question 11

The Heart

Answer 11

Two sided, four chambered pump made up mostly of cardiac muscle tissue. It contracts and expands to push blood through the whole entire body.

Question 12

Right Side Heart

Answer 12

Pumps deoxygenated blood to lungs to pick up O2 (low pressure side)

Question 13

Left Side Heart

Answer 13

Pumps oxygenated blood to all body cells (high pressure side)

Question 14

Cardiac Muscle Tissue

Answer 14

• Special type of tissue found only in the heart - Causes heart to contract - All parts contract at the same time

Question 15

Nerve Tissue

Answer 15

Sends electrical signals from the brain to cause contractions of the heart

Question 16

Connective Tissue

Answer 16

• Includes blood vessels and blood - Connects everything together

Question 17

Answer 17

1. Deoxygenated blood enters the right atrium above right ventricle through a squeezing mechanism and gravity 2. Right ventricle pushes blood via valve towards lungs by pulmonary arteries where blood is oxygenated 3. Oxygenated blood moves back towards heart via pulmonary vein which is deposited in left atrium 4. The blood moves through left ventricle where it is pumped out to rest of the body

Question 18

Interaction with other systems?

Answer 18

• Digestive: nutrients pass from digestive tract into circulatory
• Respiratory: provides oxygen to blood and takes out carbon dioxide from blood