1. Tissue
1.1. Def: Tissue are group of cells that are similar in structure that work together to perform a specific function
2. The four main tissue types
2.1. Ephithelium
2.1.1. This tissue makes lining, glandular of the body, covering.
2.1.1.1. Always layers is on the lungs
2.1.2. The cell in it are packed together very nicely, which forms a continuous layer of sheets
2.2. Connective
2.2.1. It protects, supports and binds tissue together.
2.2.2. Connective tissue is made from different cells
2.2.2.1. It is in amounts of nonliving substance around the cells called The Matrix
2.2.2.2. Examples
2.2.2.2.1. Bone
2.2.2.2.2. Cartilage
2.2.2.2.3. Fat
2.2.2.2.4. Blood
2.3. Muscle
2.3.1. This tissue's job is to contract and cause movement.
2.3.2. Three main types of muscle tissue
2.3.2.1. Skeletal muscle
2.3.2.1.1. Facts
2.3.2.2. Cardiac muscle
2.3.2.2.1. This is responsible for keeping the heart pumping it is an involuntary muscle
2.3.2.3. Smooth muscle
2.3.2.3.1. Smooth muscles contract to move substances such as food to organs
2.4. Nervous tissue
2.4.1. The cells in this tissue are called neurons that are able to receive electrical signals
2.4.2. It makes up the brain spinal cord and nerves
2.4.3. It also responds to stimuli and transmits impulses