A cell is the smallest structural and functional unit of an organism, typically microscopic and consisting of cytoplasm and a nucleus enclosed in a membrane. A plant cell has an organelle called chloroplast and an animal doesn't.
The Cell Parts
Plants have chloroplats in there cells which help them produce food while Animals
Find their own food.
NERVES:Nerves are cells that when affected send signals to different parts of the body.
MUSCLES:Muscles in the body are the only tissue that controls the movent of the body.
BONES: bones have many functions including holding muscles and tissue together.
A relationship with tissues is when a nerve in a muscle is affected which causes your reflexes to go off.
Components of the systems in the body
Digestive systems: pharynx, oral cavity, osphagus, stomach, small intestines, large intestines.
Respiratory system: lungs, trachea, bronchi.
Circulatory system: heart, blood, blood vessels.