Dense Connective Tissue
Dense Regular Connective Tissue
- provides strong connection
between different tissues.
- collagen fibers in dense regular are
bundled in a parallel fashion
= tendons (connect muscle to bone)
derive their strength from the
arrangement of elastic fibers
= ligaments (bind bone to bone) are
similar in structure to tendons
Dense Irregular Connective Tissue
- fibers that are not arranged in
parallel bundles
!as in dense regular connective
tissue
- large portion of dermal layer of
skin
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Elastic Connective Tissue
- a dense connective tissue
- contains predominantly elastin
!not collagen
- more elastic than dense
collagenous CT
- wall aorta and elastic ligament of
the spine
Cartilage
Hyaline
-slimy mass,firm
consistency
-elastic, pearly bluish
-cells= round/bluntly
angular
= groups of 2-8
=> cartilage lacunae
-filaments/ granules
Elastic
- elastic+ collagen
fibers
- outer ear, larynx,
epiglottis
-principle protein=
elastin
-similar to hyaline
cartilage
-bendable
Fibro
- mixture of white
fibrous+cartilaginous
tissue
-flexible, tough
-type I collagen
-in pubic symphysis,
meniscus, TMJ
Other Connective Tissue
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Bone
-osteon (Haversian system) = unit of
compact bone
-in bones of most mammals, birds,
reptiles, and amphibians
- concentric layers (lamellae) surrounding
the central Haversian canal
!bone's nerve and blood supplies
-osteoblasts form lamellae sequentially,
from external inward
- osteocytes, each living within its own
small space (lacuna)
=> contact others through canaliculi
=> exchange of nutrients and metabolic
waste
- collagen fibers in lamellae
Blood
- composed of blood cells suspended in
plasma
!comprises 55% of blood fluid
-contains dissolved proteins, glucose,
mineral ions, hormones, carbon dioxide
- red blood cells (= RBCs or erythrocytes)
- white blood cells including leukocytes
- platelets (=thrombocytes)
- oxygenated hemoglobin = color
- crustaceans & mollusks = hemocyanin
- insects & molluscs = hemolymph
- adaptive immunity = WBC’s
Embryonic Connective Tissue
Mesenchymal connective tissue Mucous connective tissue
- loosely organized
- present in embryo regardless
of origin
- viscous
- contains collagen bundles &
fibroblasts
- differentiates into blood
vessels & connective tissues
- type of connective tissue
found during fetal
development
- found as a component of
Wharton's jelly
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