A and P Mod#2 pages 50 -56
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Transcript of 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