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Anatomy weeks 1-5
| Term | Definition |
|---|---|
| Skin | The largest organ of the body, composed of three layers: the epidermis, dermis, and hypodermis. It acts as a protective barrier, regulates body temperature, and provides sensory information. |
| Epidermis | The outermost layer of skin, made up of stratified squamous epithelium. It is avascular and contains keratinocytes, melanocytes, and Langerhans cells. |
| Cytoplasm | The gel-like substance inside the cell membrane that contains the cell's organelles. |
| Cell Membrane | The outermost layer of the cell, which regulates what enters and exits the cell. |
| Anatomical Position | The standard reference position for describing the human body. The body is erect, feet are slightly apart, palms are facing forward, and thumbs are pointing away from the body. |
| Superior | Above or closer to the head. |
| Atom | The smallest unit of matter that retains the properties of an element. |
| Macromolecule | A large molecule, such as a protein, carbohydrate, or nucleic acid. |
| Skeletal System | The framework of the body, composed of bones, cartilage, and ligaments. It provides support, protection, and movement. |
| Cartilage | A type of connective tissue that is more flexible than bone. It provides cushioning and support in joints and other areas |
| Keratinocytes | The most abundant cell type in the epidermis. They produce keratin, a tough protein that provides strength and waterproofing to the skin. |
| Langerhans cells | Immune cells in the epidermis that help protect the skin from infection. |
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