The process by which an organism's internal environment is kept stable in spite of changes in the external environment is called
Messages are carried back and forth between the brain and other parts of the body by
Which organ system makes blood cells?
Which type of human body tissue can contract, or shorten?
the functions of the skeletal system
enables you to move, protects your organs, produces blood cells, and fores minerals and other until your body needs them
by making bones grow stronger and denser
How does exerise help main healthy bones?
Which type of muscle is found only in the heart?
Which type of muscle tires quickly during exercise?
while one muscle in the pair contracts, the other returns to its original length
How do pairs of skeletal muscle work together?
muscle cells can only contract.
Skeletal muscle must work in pairs because
The skin protects the body from
disease keeping disease-causing microorganisms from entering the body.
Nerves and blood vessel in the skin are located in the
The bones that form the backbone are called
exercise regularly and include calcium in your diet
What is the best way to prevent osteoporosis?
The pigment melanin in the skin functions to
help protect the skin from sunburn.
The functions of the digestive systems are
to break down food, absorb nutrients, and eliminate undigested wastes from the body.
What structures enables the small intestine to absorb to large amounts of nutrients?
water is adsorbed from undigested food
Which process takes place in the large intestine?
The energy your body needs from
What carbohydrate helps your digestive system function even though your body cannot digest it?
What substance in the mouth contains an enzyme that begins chemicals digestion?
What process involves muscle contraction that move food through the esophagus?
What substance coats and protects the inside of the stomach?
In what part of the body does most chemicals digestion take place?
The process in which your body breaks down food into small nutrient molecules is called
The liver produces
Which nutrients is needed in order for all body processes to take place?
the functions of the cardiovascular system include:
transporting cells that attack disease- causing microorganisms;
carrying oxygen, glucose, and other needed materials to cells;
carrying watse products away from cells
Needed substance are carried to the body cells by
the functions of the atria is
to receive blood that comes into the heart.
blood vessels that carry blood away from the heart are called
it contains little oxygen and a lot of carbon dioxide.
When blood flows into the right atrium from the body,
the blood and the body cells.
In the capillaries materials are exchange between
If a person's blood lacked platelets, what process could not take place?
it returns to the blood through the lymphatic system.
What eventually happens to fluid that leaks from capillaries into thye surrounding tissues?