TISSUES
MC1: ANATOMY & PHYSIOLOGY
Mr. Eric Mahinay| 1St Semester | BSN – 1C
S.Y. 2023 – 2024
MAJOR TISSUES
• Cells are arranged in tissues that provide specific function
for the body
• Cells of different tissues are structured differently, which
leads to their differences in function.
• Tissues of the human body – has 4 major types
4 MAJOR TISSUES
STRATFIED EPITHELIUM
PSEUDOSTRATIFIED EPITHELIUM
• Appear layered; but not truly layered
o Due to varying positions of their nuclei within the
row of cells
• FUNCTION: Secretion and protection
• Cilia may be present, along with mucus-secreting goblet
cells
o Line and sweep debris from respiratory tubes
EPITHELIAL TISSUES
• Widespread throughout the body
o Covers organs, and lines body surfaces
• Anchored to a basement membrane
• Tightly packed cells containing little intercellular material
• Generally, lack blood vessels
o Avascular – “no blood”
• Replaced frequently
STRATFIED SQUAMOUS EPITHELIUM
SIMPLE EPITHELIUM • Made up of layers of flattened cells
o Designed to protect underlying layers
SIMPLE SQUAMOUS EPITHELIUM • FUNCTION: Protect
• Made up of a single layer of thin, flattened cells • Makes up the outer layer of the skin
• Suited for diffusion • Lines the:
• FUNCTION: Exchange of gases, protection o Mouth
o exchange of gases in the lungs o Throat
o Lines blood and lymph vessels as well as body o Vagina
cavities o Anal canal
• In the skin, outer layers of the cell undergo keratinization
o Does not occur where tissues remain moist
- Throat, vagina, anal canal
SIMPLE CUBOIDAL EPITHELIUM
• Single layer of cube-shaped cell
o Nuclei – centrally located
• FUNCTION: Secretion and absorption
o Secretion & absorption - Kidneys
o Secretion – glands
STRATFIED CUBOIDAL EPITHELIUM
• Consists of three layers of cuboidal cells lining a lumen
of the:
o Mammary glands
o Sweat glands
o Salivary glands
SIMPLE COLUMNAR EPITHELIUM o Pancreas
• FUNCTION: Protect
• Made up of a row of elongated cells o Several layers of cells provide greater protection
o Nuclei – all located near the basement membrane than one single layer
o May be ciliated
• FUNCTION: Protection, Secretion, Absorption
o Protects underlying tissues - Lines the uterus,
stomach, and intestines
o Absorb nutrients
- Intestine – these cells possess microvilli
- Increase the surface area available for
absorption
o Secretes digestive fluids - Mucus-secreting
goblet cells can be found among columnar cells
TRANSCRIBED BY: LOVE FRANCHESKA LEGASPI 1
MC1: ANATOMY & PHYSIOLOGY
Mr. Eric Mahinay| 1St Semester | BSN – 1C
S.Y. 2023 – 2024
MAJOR TISSUES
• Cells are arranged in tissues that provide specific function
for the body
• Cells of different tissues are structured differently, which
leads to their differences in function.
• Tissues of the human body – has 4 major types
4 MAJOR TISSUES
STRATFIED EPITHELIUM
PSEUDOSTRATIFIED EPITHELIUM
• Appear layered; but not truly layered
o Due to varying positions of their nuclei within the
row of cells
• FUNCTION: Secretion and protection
• Cilia may be present, along with mucus-secreting goblet
cells
o Line and sweep debris from respiratory tubes
EPITHELIAL TISSUES
• Widespread throughout the body
o Covers organs, and lines body surfaces
• Anchored to a basement membrane
• Tightly packed cells containing little intercellular material
• Generally, lack blood vessels
o Avascular – “no blood”
• Replaced frequently
STRATFIED SQUAMOUS EPITHELIUM
SIMPLE EPITHELIUM • Made up of layers of flattened cells
o Designed to protect underlying layers
SIMPLE SQUAMOUS EPITHELIUM • FUNCTION: Protect
• Made up of a single layer of thin, flattened cells • Makes up the outer layer of the skin
• Suited for diffusion • Lines the:
• FUNCTION: Exchange of gases, protection o Mouth
o exchange of gases in the lungs o Throat
o Lines blood and lymph vessels as well as body o Vagina
cavities o Anal canal
• In the skin, outer layers of the cell undergo keratinization
o Does not occur where tissues remain moist
- Throat, vagina, anal canal
SIMPLE CUBOIDAL EPITHELIUM
• Single layer of cube-shaped cell
o Nuclei – centrally located
• FUNCTION: Secretion and absorption
o Secretion & absorption - Kidneys
o Secretion – glands
STRATFIED CUBOIDAL EPITHELIUM
• Consists of three layers of cuboidal cells lining a lumen
of the:
o Mammary glands
o Sweat glands
o Salivary glands
SIMPLE COLUMNAR EPITHELIUM o Pancreas
• FUNCTION: Protect
• Made up of a row of elongated cells o Several layers of cells provide greater protection
o Nuclei – all located near the basement membrane than one single layer
o May be ciliated
• FUNCTION: Protection, Secretion, Absorption
o Protects underlying tissues - Lines the uterus,
stomach, and intestines
o Absorb nutrients
- Intestine – these cells possess microvilli
- Increase the surface area available for
absorption
o Secretes digestive fluids - Mucus-secreting
goblet cells can be found among columnar cells
TRANSCRIBED BY: LOVE FRANCHESKA LEGASPI 1
