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!
The answer is true c:
If you ever need help with questions like this a good site to use would be "Quizlet"
That site has a lot of study guides for tests with the exact questions and answers that would be in a lesson or text so you can get the best help
Answer:
consider the possibility of assault
Explanation:
There are plenty of cases in sexual assault this happens
It is a mixture from both Hereditary traits and traits gained from the environment where you were born or in general.
Answer:
not to vape:
1. your body is inhaling toxic metals
2. it can cause lung problems
not to use tobacco products:
1. you can develop an addiction
2. not good for health
to avoid secondhand smoke:
1. it will help ur body's health
2. wouldn't hurt to stay away from it
Explanation:
or juss do u lol
