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There are 11 kinds of organ system namely:
Circulatory system:
Circulates blood around the body via the heart, arteries and veins, delivering oxygen and nutrients to organs and cells and carrying their waste products away.
Keeps the body's temperature in a safe range.
Digestive system and Excretory system:
System to absorb nutrients and remove waste via the gastrointestinal tract, including the mouth, esophagus, stomach and intestines.
Eliminates waste from the body.
Endocrine system:
Influences the function of the body using hormones.
Integumentary system / Exocrine system:
Skin, hair, nails, sweat and other exocrine glands
Immune system and lymphatic system:
Defends the body against pathogens that may endanger the body.
The system comprising a network of lymphatic vessels that carry a clear fluid called lymph.
Muscular system:
Enables the body to move using muscles.
Nervous system:
Collects and processes information from the senses via nerves and the brain and tells the muscles to contract to cause physical actions.
Renal system and Urinary system
The system where the kidneys filter blood to produce urine.
Reproductive system:
The sex organs required for the production of offspring.
Respiratory system:
Brings air into and out of the lungs to absorb oxygen and remove carbon dioxide.
Skeletal system:
Bones maintain the structure of the body and its organs.
Hematopoietic system:
Creates the cells that travel in blood

explain why heating a contained gas that is held at a constant volume increases its pressure. describe what happens to the volume of a balloon when it is taken outside on a cold winter day. the volume decreases. the molecules have less kinetic energy and cause less pressure on the inside of the balloon.

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