Circulatory System Flashcards
0
Q
Functions of the circulatory system
A
Transport blood
- Nutrients and oxygen to cells
- Waste products away from cells
1
Q
Respiration
A
The metabolic process whereby organisms obtain energy from organic molecules
2
Q
Main parts of the circulatory system
A
- Heart
- Blood vessels
- Blood
3
Q
The heart
A
- Muscular organ
- Pumps blood around the body
- Contains two sides and four chambers
4
Q
Closed circulatory system
A
Blood flows around the body enclosed in the blood vessels
5
Q
Arteries
A
- Blood vessels taking blood away from the heart
- Have thicker, more muscular walls than veins
6
Q
Capillaries
A
- Tiny blood vessels
- Walls a single layer of cells
- Allow substances to pass through easily
7
Q
Veins
A
- Capillaries join to form veins
- Blood vessels that transport blood towards the heart
- Has thiner walls than arteries
8
Q
Two main pathways of the blood in the body involving the lungs, the heart and rest of the body.
A
- Oxygen deprived blood pumped from heart to lungs to return oxygenated blood to the heart
- Oxygenated blood pumped to the rest of the body to return deoxygenated blood to the heart
9
Q
Health issues relating to the circulatory system
A
High blood pressure
Heart attack
Stroke
10
Q
High blood pressure
A
- Blood pushed agains artery walls too high.
- Artery walls compensate by pushing back harder and become thickened
- Less space for blood to flow
11
Q
Heart attack
A
- Blood flow to the actual heart muscle blocked.
- Muscle dies or gets damaged
12
Q
Stroke
A
- Blood flow to brain stopped
- Blood vessels burst or blocked by a clot
- Brain cells begin to die
