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Connective Tissue (CT) Characteristics 1.CT is most varied tissue in make-up, location, and function 2.Lots of intracellular space= (matrix) 3.Matrix contains.

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Presentation on theme: "Connective Tissue (CT) Characteristics 1.CT is most varied tissue in make-up, location, and function 2.Lots of intracellular space= (matrix) 3.Matrix contains."— Presentation transcript:

1 Connective Tissue (CT) Characteristics 1.CT is most varied tissue in make-up, location, and function 2.Lots of intracellular space= (matrix) 3.Matrix contains fibers and ground substance 4.Usually vascular 5.Made from mesenchyme- embryonic CT

2 CT Classification dense AreolarAreolar a di p o s e r et ic ul a r I r r e g ul a r regularregular bloodblood lymphlymph cartilage bone fiborousfiborous e l a s ti c hylainehylaine spongyspongy compactcompact

3 Functions of CT 1.Establishes structural framework 2.Transport substances 3.Protection of organs 4.Supporting, surrounding, and interconnecting other tissue types 5.Storing energy reserves 6.Defending body from invading microbes

4 Types of CT 1.CT proper- ex. fat, tendons - divided into 2 types based on proportions of cells, fibers, ground substance a. Loose b. Dense 2.Fluid CT- ex. blood, lymph 3.Supporting CT- ex. Cartilage, osseous

5 Cells of CT ALWAYS ( in CT proper) 1. Fibroblasts- make ground substance MAYBE Macrophages- large amoeboid, engulf pathogens Chondrocytes- cartilage cells Adipocytes- fat cells Erythrocytes- RBC Mesenchymal- stem cells, respond to local injury by making more cells Mast cells-stimulate local inflammation after injury Many others

6 Fibers of CT 1.Collagen- strongest, long, straight, unbranched, like rope, make up ligaments and tendons 2.Reticular- same fibers as collagen, web- like, support 3.3. Elastic- branched, wavy, stretch and return to original length, connect vertebrae

7 CT proper 1.Loose CT- “packing material”, a. Areolar –separates skin from deeper tissues

8 CT proper 1.Loose CT- “packing material”, b. Adipose – store energy, insulate, protect (padding)

9 CT proper 1.Loose CT- “packing material”, c. Reticular- interlacing fibers create stroma(3-D network), inside organs of liver and spleen

10 CT proper 2.Dense CT-”fibrous tissue” a. Regular- collagen fibers run parallel ex. Tendons

11 CT proper 2.Dense CT-”fibrous tissue” b. Irregular- collagen fibers interwoven in no pattern ex. Nerve and muscle sheaths

12 CT proper 2.Dense CT-”fibrous tissue” c. Elastic- a type of dense, regular, w/ more elastic fibers ex- walls of bl.v

13 Fluid CT 1.Blood a. Formed elements- RBC, WBC, platelets b. Plasma- watery matrix 2. Lymph

14 Supporting CT 1.Cartilage a. avascular b. Surrounded by perochondrium (for attachment) c. Cells called chondrocytes, located in lacunae or nests d. Matrix is gel-like

15 2. Types of Cartilage A.Hyaline -most common in body -few, closely packed collagen fibers -tough, and flexible -makes up fetal skeleton - adult –trachea rings, nose, costal area of ribs

16 2. Types of Cartilage B.Elastic -elastic fibers -outer ear

17 2. Types of Cartilage C. Fibrocartilage -many collagen fibers, little matrix -between vertebrae, cushions, absorbs shock

18 3. Osseous Tissue/Bone A.Matrix is solid, made of 1. collagen fibers 2. calcium salts B. Cells are osteocytes, located in nests called “lacunae” C. Covered with periosteum- has fibrous layer for attachment, and cellular layer for repair

19 Spongy Bone Made of trabeculae Contain lacunae and osteocytes

20 CT Classification dense AreolarAreolar adiposeadipose reticularreticular I r r e g ul a r regularregular bloodblood lymphlymph cartilage bone fiborousfiborous e l a s ti c hylainehylaine spongyspongy compactcompact


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