1. The cells of the SA node at the top of the heart are known as the pacemaker of the heart because the rate at which these cells send out electrical signals determines the rate at which the entire heart beats (heart rate).
2. septum : The septum is a thick wall of muscle that divides the heart. It separates the left and right sides of the heart.
3.The respiratory and circulatory systems work together to maintain homeostasis. The respiratory system moves gases into and out of the blood. The circulatory system moves blood to all parts of the body.
hope this helps! sorry I couldn't do all of them!
Answer:
<h2>Oldest sister </h2>
Explanation:
<h2>Sana makatulong </h2>
<h2>welcome po </h2>
Explanation:
what happened here guys who is Jesus
Answer: This is very good advice, and showed always know your surroundings. Also may I have the brainlest?
1. It can be done alone or with a friend.
2. the ability to maintain stable levels of oxygen and blood flow during an extended period of physical activity
3. Be inactive.
4. Type I diabetes
5. community
6. tai chi
7. lack of confidence
8. baseball
9. 5 to 10 minutes
10. efficacy
11. rhythm and sequencing
12. Is it scientifically based?
13. the ability of muscles to function over a period of time without becoming tired
14. stating when and how often you will do the steps
15. Increase endurance over a limited amount of time.
16. scammer
17. a mix of low, moderate, and vigorous
18. intensity
19. 15
20. Pilates
