Tissues Flashcards
What are the four types of tissues
Epithelial, Connective, Muscular, Nervous
What is epithelial tissue used for?
It covers exposed surfaces, lines internal passageways and chambers, and produces glandular secretions
What is connective tissue used for?
It fills internal spaces, provides structural support, and stores energy
What is muscle tissue used for?
Contracts to produce active movement
What is nervous tissue used for?
Conducts electric impulses and carries information
Types of Epithelial Tissue?
Simple (one layer), Stratified (two or more layers), psuedostratified (has one layer but appears stratified)
Epithelial Tissue Cell Shapes?
Squamous (Thin and flat with a “squished nuclei”), Cuboidal (cubed shaped cells with a centered and round nucleus), Columnar (long cell shape with a nucleus at the bottom)
Types of Glandular Epithelia
Endocrine (Secrete into the bloodstream or lymph) & Exocrine glands (Secrete outside the body)
Types of secretion
Merocrine secretion (Exocytosis, Ex. Sweat), Apocrine Secretion (Ex. Sweat from pubic area), Hulocrine Secretion (Bursting of glandular cells, Ex. Sebum)
Types of cartilage?
Hyaline, Fibrous, and Elastic
Where is Hyaline Cartilage found? Characteristics?
Between bones and joints and makes up the tracheal cartilage rings. It helps reduce friction.
Where is Elastic cartilage found? Characteristics?
Auricle of Ear. It is the most flexible form of cartilage.
Where is Fibrous cartilage found? Characteristics?
In the invertibral disks and within the knee joint. It resists compression and heals poorly and slowly.
Structure of a Osteon?
Starts with a center canal
The canal is surrounded by concentric lamellae
The concentric lamellae has osteocytes in Lacunae
Also within the lamellae are canaliculi which help with diffusion of nutrients
Osteons have perforating canals that link osteons side by side as well as interstitial lamellae
The outer layer of the bone that makes it smooth is called the circumferential lamellae
What is Fascia?
A type of connective tissue that connects organs with the rest of the body