Answer:
Arteries carry blood away from the heart; veins carry blood back to the heart.
Explanation:
In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.
Generally, the cardiac cycle occurs in two (2) stages;
Diastole: in this stage, the ventricles is relaxed and would be filled with blood.
Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.
The best description for arteries and veins is that arteries carry oxygenated blood away from the heart to other parts of the body such as brain, lungs, tissues, etc; veins carry blood that is low in oxygen content back to the heart.
Answer:
Sleep
Explanation:
It is the state in which the consciousness is altered and is characterised by the following feature
- Reduced muscular activity
- The response to the outer stimuli is decreased
- There is stage of rapid eye movement in the deep sleep
During sleep, there are different changes that occur in the body such as decrease in blood pressure ,changes in the brain activity ,change in the breathing rate and body temperature.
The amount of sleep needed by an individual changes as the body ages , for example a baby needs more sleep than the adult ,who needs 6-8 hours per day to function properly .
Answer:
There are 2 Valve Systems
Explanation:
The mitral valve and tricuspid valve are located between the atria (upper heart chambers) and the ventricles (lower heart chambers).
