Section 1 Flashcards
What are the important functions of the circulatory system? (5)
- Gas exchange: delivery of oxygen, removal of carbon dioxide.
- Nutrient and water delivery and absorption: by cells.
- Removal of heat and metabolic waste: exercising muscle generates excess heat and the constant supply of fresh blood flowing through the muscle can help remove this heat as well as metabolic wastes.
- Immunity and defense: the blood transports key immune cells that can quickly identify and neutralize foreign particles.
- Cell communication: cells from one part of the body can communicate with other more distant cells by releasing chemical messages into the blood
What is the circulatory system, and how does it operate?
The circulatory system is a closed-loop system with two pumps (left and right sides of the heart) and two circulation systems (pulmonary and systemic). Blood moves from the heart to the lungs and the rest of the body.
Name the two pumps in the circulatory system.
The two pumps in the circulatory system are the left and right sides of the heart.
What are the two circulation systems in the circulatory system?
The two circulation systems are the pulmonary circulatory system (to and from the lungs) and the systemic circulatory system (throughout the rest of the body).
Describe the flow of blood in the broader sense throughout the circulatory system.
Blood flow is serial, starting from the left side of the heart, flowing through the systemic circulation, then into the right side of the heart. It further moves into the lungs before returning to the left side of the heart.
Is the systemic circulation designed for serial or parallel blood flow?
The systemic circulation is designed for parallel blood flow. When blood leaves the left side of the heart, it flows through branching blood vessels that direct it to all tissues and organs simultaneously.
How does blood flow through the systemic circulation after leaving the left side of the heart?
After leaving the left side of the heart, blood flows through branching blood vessels that deliver it to all tissues and organs in parallel.
What happens to the branched blood vessels after blood has circulated through the tissues and organs in the systemic circulation?
After circulating through tissues and organs, the branched blood vessels come back together to deliver all the blood back to the right side of the heart.
How is the circulatory system similar to a series electrical circuit?
Similar to a series circuit, the circulatory system as a whole operates in a serial manner. Blood flows down one path, from the left side of the heart to the right side, resembling the flow of electrons in a counterclockwise direction in a series circuit
How is the systemic circulatory system similar to a parallel electrical circuit?
Similar to a parallel circuit, the systemic circulatory system allows blood to flow down many paths simultaneously. Blood flows in a counterclockwise direction but can take various intermediate paths before returning to point 1.
Is cell communication a function of the circulatory system?
Yes
What does the circulatory system facilitate when it comes to nutrients?
The circulatory system is responsible for nutrient delivery.
Which of the following IS a function of the circulatory system?
- Gas exchange
- Nutrient delivery
- Production of white blood cells
- Immunity
- Detoxification
- Digestion
- Production of insulin
- Nutrient Breakdown
- Removal of metabolic wastes
- Water absorption
- Storage of white blood cells
- Heat dissipation
- Cell communication
- Gas exchange
- Nutrient delivery
- Immunity
- Removal of metabolic wastes
- Water absorption
- Heat dissipation
- Cell communication
