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Types of human tissues, https://cewaedu-my.sharepoint.com/:w…
Types of human tissues
Nervous tissue
Found:
brain and spinal cord
nerves that branch off the spinal cord
Looks like:
made of neurons
most have dendrites
long axons
Branching dendrites
image 1
muscular tissue
Found:
heart (cardiac)
organs(smooth)
along the skeleton (skeletal)
Looks like:
long and fibrous
many have more than one nucleus
cardiac
striped(striated)
intercalated discs
made of tiny fibres called myofibrils
.
skeletal
striped (striated)
no intercalated discs
made of tiny fibres called myofibrils
smooth
not striped
no discs
Image 2
types:
cardiac
skeletal
smooth
Epithelial Tissue
Found
covers the whole surface of the body
squamous
line organs and cavaties
cuboidal:
galnds
ducts
tubules
columnar(non-ciliated):
digestive track
columnar(ciliated):
respiratory tract
urine tubes
Types:
squamous
cuboidal
columnar
ciliated columnar
Looks like/Function
squamous
thin and only one layer thick
allow substances to diffuse across them easily
can absorb and secrete substances
cuboidal
cubed shaped tissue
allow limited protection, secretion and absorption
columnar
long skinny cells
also protect, secrete and absorb
columnar(ciliated)
long skinny cells
also protect, secrete and absorb
cilia help sweep debris and cells along (in respiratory tract and fallopian tube)
image 3
Connective Tissue
loose connective tissue
Found:
beneath skin, cushioning and supporting organs
looks like
contains 3 fibres : collagen, reticular and elastic
contains various types of cells: fibroblasts, adipose, macrophages and mast cells
Dense fibrous connective
Looks like:
contains only collagen fibres and fibroblasts
Found:
ligament and tendons
covering skeletal muscles
Elastic connective tissue
Found:
arteries
lungs
allow the recoil of organs
looks like:
contains elastic fibres and cells called chondrocytes sitting in little grooves called lacunae
Reticular connective tissue
Found
:
liver
spleen
lymph nodes
bone marrow
Looks like:
contains reticular fibres made by fibroblasts
macrophages in the ground substance
adipose tissue
Found:
under skin
around organs
in various parts of the body
Looks like:
contains adipose cells(fat cells) than can contain fat in a fat vacuole
cartilage
Found:
nose
ears
trachea
joints
Looks like
:
contains elastic fibres
chondrocytes sitting in lacunae
bone
Found:
all over the body
Looks like
:
cell(osteocytes) sit in lacunae
arranged in circles around central canals and are very compact
Blood
Looks like:
Red blood cells:
round
small
have no nucleus/organelles to have space to carry oxygen
White blood cells:
come in many different shapes and function
bigger than red blood cells and not as numerous
fight diseases and allergies
can be granulated(contains granules that look like spots) or non- granulated
the nucleus in some cells has a weird shape
Platelets:
looks like little fragments of cells
function in blood clotting
no nucleus
shaped like little discs
Found:
all over the body
Types:
red blood cells
white blood cells
platelets
Image 4
Types:
loose connective tissue
dense connective tissue
elastic connective tissue
bone
blood
reticular connective tissue
adipose connective tissue
cartilage
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