A and P Mod#2 pages 50 -56

Pages 50 – 56

CONNECTIVE TISSUE

TYPES:1. connective tissue proper

2. Cartilage Supporting connective

tissue with tensile strength and supporting fibers of collagen in the ground substance

CONNECTIVE TISSUE

TYPES:1. connective tissue proper2. Cartilage

• Firmer than connective tissue proper

• Has no blood supply• Thin matrix• Found in nose, ear,

larynx• Often replaced by bone

CONNECTIVE TISSUE

TYPES:1. connective tissue proper2. Cartilage

Chondroblasts – immature cartilage cells that produce the matrix fibers.

CONNECTIVE TISSUE

TYPES:1. connective tissue proper2. Cartilage

Chondrocytes – mature chondroblast that become trapped in matrix and live in hollow spaces called lacuna in the cartilage tissue.

Lacuna (histology), a small space containing an osteocyte in bone or chondrocyte in cartilage

CONNECTIVE TISSUE

TYPES:1. connective tissue proper2. Cartilage

3 types of cartilage:

A. Hyaline cartilage occurs at end of bones,

external ear, fetal skeleton, nose, ribs and vertebrae

Weakest and most common

CONNECTIVE TISSUE

TYPES:1. connective tissue proper2. Cartilage3 types of cartilage:

B. Elastic cartilage found in epiglottis and

external ear contains elastic fibers great flexibility and is able to

withstand repeated bending

CONNECTIVE TISSUE

TYPES:1. connective tissue proper2. Cartilage3 types of cartilage:

C. Fibrous cartilage Strongest Dense collagen fibers with limited

ground substance Found in disk between vertebrae and

skull Where bears great amount of weight Has fibrous appearance

CONNECTIVE TISSUE - Cartilage

CONNECTIVE TISSUE

TYPES:1. connective tissue proper2. Cartilage

3. Bone: Hardest connective tissue

Consist of cells, collagen fibers, and mineralized (calcium and phosphate) ground substance

CONNECTIVE TISSUE

TYPES:1. connective tissue proper2. Cartilage3. Bone:

Ground substance becomes hard or calcified through a process known as calcification

CONNECTIVE TISSUE

TYPES:1. connective tissue proper2. Cartilage3. Bone:

Has a rich blood supply

Properly known as osseous tissue

CONNECTIVE TISSUE

TYPES:1. connective tissue proper2. Cartilage3. Bone

Types of bone cells:

A. Osteoblasts- make components of bone

CONNECTIVE TISSUE

TYPES:1. connective tissue proper2. Cartilage3. Bone

Types of bone cells:

B. Osteocytes – mature osteoblasts found in lacuna

CONNECTIVE TISSUE

TYPES:1. connective tissue proper2. Cartilage3. Bone

Types of bone cells:

C. Osteoclasts – reasorb bone and remodel it

CONNECTIVE TISSUE

TYPES:1. connective tissue proper2. Cartilage3. Bone

4. Blood transports

Also known as vascular tissue

Two types of cells – red and white

CONNECTIVE TISSUE

TYPES:1. connective tissue proper2. Cartilage3. Bone4. Blood

Ground substance = proteins in blood

Has fluid part – blood plasma

Has clotting fibers

QUIZ

New Topic: Membranes

Membrane = layers oftissue

There are three categories of membranes:

New Topic: Membranes

There are three categories of membranes:

1. Mucous found in linings of organ systems that open to the outside

New Topic: Membranes

There are three categories of membranes:

2. Serous

are covered by a thin layer of serous fluid that lubricates and is secreted by the epithelium

New Topic: Membranes

There are three categories of membranes:

3. Synovial membranes

connective tissue membranes that line the cavities of the freely movable joints such as the shoulder, elbow, and knee.

New Topic: Membranes

There are three categories of membranes:

3. Synovial membranes

secrete synovial fluid into the joint cavity, and this lubricates cartilage on the ends of the bones so that they can move freely and without friction.

New Topic: tissue repair

Remember: Tissues are made up of cells.

Two types of cells that make up tissue based on function:

1. Stromal cells – provide structure and support to tissue; usually connective tissue

New Topic: tissue repair

Remember: Tissues are made up of cells.

Two types of cells that make up tissue based on function:

1. Stromal cells – provide structure and support to tissue

2.Parenchymal cells – cells that actually perform the function of the tissue

Organ Parenchyma

kidney nephron

lungs alveoli, respiratory bronchiole, alveolar duct and terminal bronchiole

spleen white pulp and red pulp

brain neuron

liver hepatocyte

New Topic: tissue repair

Categories of cells based on ability to reproduce or regenerate:1. Labile cells cells that multiply constantly

throughout life Most of cells in body ex. Parenchymal epithelial

cells replace themselves quickly

New Topic: tissue repair

Categories of cells based on ability to reproduce or regenerate:

2. Stable cells only multiply when receive

external stimulus to do so ex. Bone parenchymal cells

when a bone is broken can reproduce and repair the broken bone