Unit 1 - Lesson 3

Question 1

Cardiovascular System

Answer 1

Transports blood around the body

Made of the heart, blood, and blood vessels. Is a closed circulatory system

Question 2

Blood

Answer 2

The fluid that carries gases, nutrients, and waste through the body

Maintains homeostasis by transporting hormones, nutrients, and oxygen to cells and carrying waste away from cells

Question 3

Lymphatic system

Answer 3

A group of organs that collects the fluid that leaks from blood and returns it to the blood
An open circulatory system

Made of:
Lymph nodes
Lymph vessels
Bone marrow
Tonsils
Thymus
Spleen

Question 4

Lymph

Answer 4

The leaked fluid from the blood

Question 5

Lymph Nodes

Answer 5

Small bean- shaped organs that remove pathogens and dead cells from lymph
Found in the armpits, neck and groin

Question 6

Artery

Answer 6

A blood vessel that carries blood away from the heart
Has a thick wall

Question 7

Capillary

Answer 7

A tiny blood vessel that allows exchange of substances between body cells and blood

The walls are very thin ( only 1 cell layer)

Question 8

Vein

Answer 8

A blood vessel that carries blood back to the heart
Thinner walls than arteries
Have valves

Question 9

What is blood made of?

Answer 9

Plasma - fluid part of blood
Platelets - help the blood to clot
White blood cells - fights pathogens (bacteria and viruses)
Red blood cells - carry oxygen to the cells

Question 10

Pulmonary Circulation

Systemic Circulation

Answer 10

The flow of blood between the heart and the lungs

The flow of blood between the heart and the rest of the body

Question 11

Respiratory System

Answer 11

The group of organs that takes in oxygen and gets rid of carbon dioxide

Parts of the respiratory system:
Nose
Pharynx - throat
Larynx - part of the throat that has the vocal cords
Trachea - windpipe
Bronchi - 2 branches coming from the trachea going to each lung
Alveoli - air sacs in the lungs. Gases move across the alveoli and blood vessels