idek needed tho

Tight junction

A type of cell connection that seals cells tightly together to prevent leakage between them.

Gap junction

A type of junction that allows direct communication between cells through small channels.

Desmosome

A strong, anchoring junction that holds cells together, especially under stress.

Apical

top or exposed surface of an epithelial cell (facing the body surface or cavity).

Regenerative

Describes the ability of tissue or cells to repair or replace themselves after damage.

Endothelium

Simple squamous epithelium that lines blood and lymphatic vessels.

Mesothelium

Simple squamous epithelium that lines body cavities and covers organs (e.g., pleura, pericardium).

Ciliated

Having tiny hair

Microvilli (villi) Tiny finger

like projections on the apical surface of cells that increase surface area for absorption.

Goblet cells

Specialized epithelial cells that secrete mucus.

Keratin

A tough, protective protein found in skin, hair, and nails.

Collagen

A strong, fibrous protein in connective tissue that provides strength and structure.

Endocrine

Glands that release hormones directly into the bloodstream (no ducts).

Exocrine

Glands that secrete substances through ducts to a surface (e.g., skin, digestive tract).

Edema

Swelling caused by excess fluid trapped in body tissues.

Neuron

The main cell of the nervous system that sends electrical signals.

Neuroglia

Supportive cells in the nervous system that protect and nourish neurons.

Fibroblast

A cell that produces fibers and ground substance in connective tissue.

Adipocyte

A fat cell that stores energy in the form of lipids.

Chondroblast

An immature cartilage cell that produces cartilage matrix.

Chondrocyte

A mature cartilage cell that maintains cartilage tissue.

Osteoblast

A cell that builds new bone tissue.

Osteocyte

A mature bone cell that maintains bone tissue.

Hematopoietic stem cells

Blood

Hypertrophy

Increase in cell size, leading to larger tissue or organ.

Atrophy

Decrease in cell size or number, causing shrinkage of tissue or organ.

Hyperplasia

Increase in the number of cells, leading to tissue growth.

Dysplasia

Abnormal growth or development of cells, often a warning sign for disease (like cancer).