Epithelial Cells form Epithelial Tissue

• Structure:– Epithelial Cells pack tightly together and form

continuous sheets that line different parts of the body.• Function:– Protection, secretion, absorption, and transport

• Examples: – Inside the mouth (cheek cells) – Line organs like the stomach– Surround the outside of organs– Make the outer layer of skin

MUSCLE TISSUE• Structure:– Muscle cells make specialized tissue that can contract. – Muscle tissue contains the specialized proteins actin

and myosin that slide past one another.• Function:– Allows for movement of limbs and contraction.

• Examples: – Heart – Cardiac Muscle– Body Movement—Skeletal Muscle– Digestive Tract, Veins/Arteries, Bladder—Smooth

Muscle

NERVE TISSUE• Structure:– Elongated cells with many branches.

• Function:– Has the ability to generate and conduct electrical

signals in the body. – These signals are managed by the brain and

transmitted down the spinal cord to the body.

White Blood Cell

• Structure:– Large, flexible cells– Covered in proteins that recognize invaders.

• Function:– Part of your immune system.– Fight off bacteria and other invaders.

• Examples:– Neutrophils – engulf bacteria– Basophil – Release histamine to promote and

inflammatory response.

Red Blood Cell

• Structure:– Round, disc-shaped cell– Concave center

• Function:– Transport oxygen

throughout the body.

Plant Leaf vs. Plant Stem• Leaf– Contains Guard Cells that open and close to allow

for gas exchange– Lined with Chloroplasts

• Stem– Contain Xylem and Phloem that carry food and

water up the stem of the plant.