Khady GuiroC2Prism 2011-2012

Body Tissues

A tissue is a group of cells that have similar structure which function together as a unit.

A nonliving material, called the intercellular matrix, fills the spaces between the cells.

There are four main tissue types in the body: epithelial, muscle, connective and nervous.

Each is designed for specific functions.

Example

Connective Tissues

Connective Tissues

Found everywhere in the body.

Includes the most abundant and widely distributed tissues.

Functions Binds body tissues together Supports the body Provides protection

Variations in blood supply Some tissue types are well vascularized Some have poor blood supply or are

avascular

Extracellular matrix Non-living material that surrounds living

cells

Connective Tissue Characteristics

Extracellular Matrix

Two main elements Ground substance – mostly water along with

adhesion proteins and polysaccharide molecules

Fibers Produced by the cells Three types

Collagen fibers Elastic fibers Reticular fibers (Next class)

Connective Tissue Types

Bone Composed of:

Bone cells in lacunae (cavities) Hard matrix of calcium salts Large numbers of collagen fibers

Used to protect and support the body

Connective Tissue type

Hyaline cartilage

Most common cartilage

Composed of: Abundant collagen fibers Rubbery matrix

Entire fetal skeleton is hyaline cartilage

Connective tissue type

Elastic cartilage Provides elasticity

Example: supports the external ear

Connective tissue types

Fibro-cartilage Highly compressible

Example: forms cushion-like discs between vertebrae

Connective tissue types

Dense connective tissue Main matrix element is collagen fibers Cells are fibroblasts

Examples Tendon – attach muscle to bone Ligaments – attach bone to bone

What have we learned?

Multiple Multiple Questions for 10

Points

Linking of bone to bone in a skeletal system is accomplished by which of these tissues?

A) EpithelialB) ConnectiveC) MuscleD) Nervous

B) Connective

Answer

Hard parts of the body would be made of which of these cell/tissue types? A) Blood B) Bone C) MuscleD) Nerves

Multiple Multiple Questions for 10

Points

Answer

B) Bone

Multiple Multiple Questions for 10

Points

The major function of bone is ___. A) covering body surfaces B) movementC) supportD) integration of stimulus

Answer

C) support