Lab 5 Tissues and Skin BIO201L
Student Name: Gloria Arajulu
Access Code (located on the lid of your lab kit): AC-OF21AP
Pre-Lab Questions:
1. What is a tissue?
A tissue is a group of specialized cells that work together to perform a specific function in
the body. Tissues are fundamental building blocks of organs and play crucial roles in
maintaining the structure and functioning of various body systems.
2. What is the function of epithelial tissue?
The function of epithelial tissue is to provide protection, absorption, secretion, and diffusion.
It forms the outer layer of the skin and lines various organs and body cavities, acting as a
barrier and facilitating essential physiological processes.
3. What is the function of connective tissue?
The function of connective tissue is to support, connect, and protect various structures in the
body. It provides structural integrity to organs and helps bind different tissues together,
forming a framework that supports and protects other tissues and organs. Additionally,
connective tissue plays a vital role in transporting nutrients, waste products, and immune
cells throughout the body.
4. What is the function of muscular tissue?
The function of muscular tissue is to generate force and facilitate movement. Muscular tissue
allows the body to contract and produce motion, enabling activities such as walking, running,
and internal processes like digestion and breathing.
5. What is the function of nervous tissue?
The function of nervous tissue is to transmit electrical signals and coordinate communication
between different parts of the body. It forms the nervous system, which includes the brain,
spinal cord, and nerves, and plays a crucial role in sensory perception, motor control, and the
integration of information to maintain homeostasis and respond to external stimuli.
6. Describe sebaceous glands, sweat glands, and hairs with regard to the function of the skin.
Sebaceous glands produce sebum, an oily substance that moisturizes and protects the skin.
Sweat glands regulate body temperature by producing sweat to cool the bod . Hairs serve as
sensory receptors and provide protection against external elements.
7. What is the function of melanin?
Melanin protects against UV radiation and gives color to skin, hair, and eyes.
8. List the similarities and differences of the layers of the epidermis.
,Lab 5 Tissues and Skin BIO201L
Similarities of the layers of the epidermis: 1. All layers are composed of epithelial cells. 2.
They are involved in protecting the underlying tissues and regulating water loss. Differences
of the layers of the epidermis: 1. The epidermis consists of five layers: stratum corneum,
stratum lucidum (only in thick skin), stratum granulosum, stratum spinosum, and stratum
, Lab 5 Tissues and Skin BIO201L
basale (also known as stratum germinativum). 2. The thickness and cell appearance vary in
each layer, with the stratum corneum being the thickest and composed of dead, flat cells,
while the stratum basale is the thinnest and contains actively dividing cells. 3. The stratum
lucidum is only present in thick skin found in areas like the palms and soles. 4. The stratum
basale is responsible for continuous cell division and the regeneration of new epidermal cells.
5. The stratum granulosum plays a role in the synthesis of keratin, a tough protein that
provides strength to the skin. 6. The stratum spinosum contains keratinocytes connected by
desmosomes, contributing to the skin's overall strength and resilience.
Experiment 1: Microscopic Slide Examination of Tissue
Identify the following tissue slides:
A- Simple squamous epithelium
B- Simple Cubodial Epithelium
C- Adipose Connective
D- Reticular Connective
E- Elastic Cartilage Connective
F- Cardiac Muscle Tissue
G- Skeletal Muscle Tissue
H- Reticular Connective Tissu
A) Epithelial Tissue Type
Student Name: Gloria Arajulu
Access Code (located on the lid of your lab kit): AC-OF21AP
Pre-Lab Questions:
1. What is a tissue?
A tissue is a group of specialized cells that work together to perform a specific function in
the body. Tissues are fundamental building blocks of organs and play crucial roles in
maintaining the structure and functioning of various body systems.
2. What is the function of epithelial tissue?
The function of epithelial tissue is to provide protection, absorption, secretion, and diffusion.
It forms the outer layer of the skin and lines various organs and body cavities, acting as a
barrier and facilitating essential physiological processes.
3. What is the function of connective tissue?
The function of connective tissue is to support, connect, and protect various structures in the
body. It provides structural integrity to organs and helps bind different tissues together,
forming a framework that supports and protects other tissues and organs. Additionally,
connective tissue plays a vital role in transporting nutrients, waste products, and immune
cells throughout the body.
4. What is the function of muscular tissue?
The function of muscular tissue is to generate force and facilitate movement. Muscular tissue
allows the body to contract and produce motion, enabling activities such as walking, running,
and internal processes like digestion and breathing.
5. What is the function of nervous tissue?
The function of nervous tissue is to transmit electrical signals and coordinate communication
between different parts of the body. It forms the nervous system, which includes the brain,
spinal cord, and nerves, and plays a crucial role in sensory perception, motor control, and the
integration of information to maintain homeostasis and respond to external stimuli.
6. Describe sebaceous glands, sweat glands, and hairs with regard to the function of the skin.
Sebaceous glands produce sebum, an oily substance that moisturizes and protects the skin.
Sweat glands regulate body temperature by producing sweat to cool the bod . Hairs serve as
sensory receptors and provide protection against external elements.
7. What is the function of melanin?
Melanin protects against UV radiation and gives color to skin, hair, and eyes.
8. List the similarities and differences of the layers of the epidermis.
,Lab 5 Tissues and Skin BIO201L
Similarities of the layers of the epidermis: 1. All layers are composed of epithelial cells. 2.
They are involved in protecting the underlying tissues and regulating water loss. Differences
of the layers of the epidermis: 1. The epidermis consists of five layers: stratum corneum,
stratum lucidum (only in thick skin), stratum granulosum, stratum spinosum, and stratum
, Lab 5 Tissues and Skin BIO201L
basale (also known as stratum germinativum). 2. The thickness and cell appearance vary in
each layer, with the stratum corneum being the thickest and composed of dead, flat cells,
while the stratum basale is the thinnest and contains actively dividing cells. 3. The stratum
lucidum is only present in thick skin found in areas like the palms and soles. 4. The stratum
basale is responsible for continuous cell division and the regeneration of new epidermal cells.
5. The stratum granulosum plays a role in the synthesis of keratin, a tough protein that
provides strength to the skin. 6. The stratum spinosum contains keratinocytes connected by
desmosomes, contributing to the skin's overall strength and resilience.
Experiment 1: Microscopic Slide Examination of Tissue
Identify the following tissue slides:
A- Simple squamous epithelium
B- Simple Cubodial Epithelium
C- Adipose Connective
D- Reticular Connective
E- Elastic Cartilage Connective
F- Cardiac Muscle Tissue
G- Skeletal Muscle Tissue
H- Reticular Connective Tissu
A) Epithelial Tissue Type
