Biology Flashcards
(14 cards)
Capillaries
Tiny blood vessels that carry blood into and out of any body tissues
Veins
Take blood towards the heart
Respiration
A chemical reaction that occurs in the mitochondria of cells in Which glucose and oxygen react to produce carbon dioxide and water, releasing energy
What is the primary function of the circulatory system?
To transport oxygen, nutrients, hormones, and waste products throughout the body
The circulatory system plays a critical role in maintaining homeostasis.
What are the main components of the circulatory system?
- Heart
- Blood
- Blood vessels
The heart acts as a pump, blood serves as the transport medium, and blood vessels are the conduits.
What type of blood vessels carry blood away from the heart?
Arteries
Arteries have thick walls to withstand high pressure from the heart’s pumping action.
What is the role of veins in the circulatory system?
To carry blood back to the heart
Veins have valves to prevent backflow of blood.
Fill in the blank: The _______ is responsible for pumping blood throughout the body.
heart
The heart consists of four chambers: two atria and two ventricles.
True or False: Blood is composed only of red blood cells.
False
Blood consists of red blood cells, white blood cells, platelets, and plasma.
What is the function of red blood cells?
To transport oxygen from the lungs to the body’s tissues
Red blood cells contain hemoglobin, which binds to oxygen.
Fill in the blank: The _______ circulatory system is responsible for transporting blood between the heart and the lungs.
pulmonary
This system allows for the exchange of carbon dioxide for oxygen.
What is the purpose of capillaries in the circulatory system?
To facilitate the exchange of substances between blood and tissues
Capillaries are the smallest blood vessels and have thin walls to allow for diffusion.
What type of blood vessels are involved in nutrient and gas exchange?
Capillaries
They connect arterioles and venules, enabling the transfer of oxygen, carbon dioxide, nutrients, and wastes.
What is the role of the heart valves?
To prevent the backflow of blood
There are four main valves in the heart: tricuspid, pulmonary, mitral, and aortic.
