Lesson 4 Flashcards
(39 cards)
Define the circulatory system
A system that transports nutrients and other life sustaining resources and helps fight infections and remove waste
What does the heart do
Contract to pump blood around the body
What is the cardiovascular system
The part of the circulatory system that pumps blood throughout the body
How does blood travel
From the lungs to the left atrium to the left ventricle then to the body and back through the right atrium, down the the right ventricle and out to the lungs to start the process over again
What is a double loop system
When blood travels from the heart to the lungs and back again in one loop and in the other oxygenated blood moves from the heart to the body and back again without oxygen
What do red blood cells do
The take the oxygen from the lungs and carry it to the rest of the body and take the carbon dioxide back to the lungs to be expelled
What are the three types of blood vessels
Artery, vein, capillary
What does an artery do
Carried blood away from the heart, thicker walls
What do veins do
Carries blood back to the heart, thinner walls
What do capillaries do
A tiny blood vessel where substances are exchanged between blood and body cells, connect veins and arteries
What is diffusion’s role in the circulatory system
It allows oxygen and other nutrients to move through capillary walls like glucose going from the blood, which is high in it to the cells which is low
Define blood pressure
The force with which ventricles of the heart contract
What does blood contain
Red blood cells, white blood cells, platelets, and plasma
What do white blood cells do
Fight disease
What do platelets do
Clot wounds
What is plasma
The liquid part of the blood
What is the lymphatic system
A network of vessels and nodes that rerun fluid to the bloodstream
What is lymph
The fluid inside the lymphatic system composed of water, white blood cells, and dissolved materials such as glucose
Where does lymph flow
Through lymph vessels and then into the lymph nodes to be filtered of bacteria and disease causing microorganisms
What is the respiratory system
The system that brings air containing oxygen into the body and remove carbon dioxide and water from it
What does the respiratory system include
Lungs, nose, trachea, bronchi, and alveoli
Define bronchi
The two passages that direct air into the lungs
Define alveoli
Thin walled sacs of lung tissue where gasses can move between air and blood
