BIO201 Lab 5

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Grand Canyon University *

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201

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Biology

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Jan 9, 2024

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Lab 5 Tissues and Skin BIO201L Student Name: MA ERICKA RENEE SAUVE Access Code (located on the lid of your lab kit): 2XVADW Lab Report Format Expectations Utilize college level grammar and professional formatting when completing this worksheet. Submissions without proper formatting, all required photos or sufficient responses will be rejected. Pre-lab Questions 1. What is a tissue? a group of cells working together to perfome specific functions form a tissue. 2. What is the function of epithelial tissue? Epethelial tissue has wide variety of functions depending on its location. It function includes excretion, secretion diffusion and protection 3. What is the function of connective tissue? Connective tissue functions depend on type of cells present there its functions include transportation protection from pathogens and supporting body organs . 4. What is the function of muscular tissue? musculer tissue is contractile connective tissue its main functions include provide movement in ths body locomotion stabilizing body posture heart contraction. 5. What is the function of nervous tissue? Nervous tissue transport impulses through which it communicates with other body parts and integrate body functions 6. Describe sebaceous glands, sweat glands, and hairs with regard to the function of the skin. Sebaceous glands called oil glands secretes sebum sweat glands secrtes sweat which functions to cool body temprature, hair has hair follicles linked to sebaceous glands. 7. What is the function of melanin? Function of melanin is to provide protection of body from sunlight rays mostly UV

Lab 5 Tissues and Skin BIO201L 8. List the similarities and differences of the layers of the epidermis. Presence of many layers Epidermis has many type of cells All of these cells functions to prevent the skin and they only varyin thickness and size

Lab 5 Tissues and Skin BIO201L EXPERIMENT 1: OBSERVATION OF MITOSIS IN A PLANT CELL Introduction Questions 1. What is the difference between simple, stratified and pseudostratified epithelial tissue? Simple epthelium as simple layer of cells that has connection with basemeent membrane while stretified has many layers and pseudostratified has one layer that has structure of multilayer 2. What is the difference between multipolar, bipolar and unipolar neurons? Multipolar neurons have single long exons with multiple dendrites and bipolar have two sensory receptors and unipolar is single neuron with one sensory receptor and dendrite 3. Does the number of cell layers or the cell shape play a role in the function of the epithelial tissue? Provide three examples. Click here to enter text.

Lab 5 Tissues and Skin BIO201L Data and Observations 1. Identify the following tissue slides . ( Hint : Use the given tissue types to find them within the online database.) ” A. Tissue looks Simple squamous. B. This is simple cuboidal epithemlium C. It is Adipose connective tissue D. Reticular connective tissue E. elastic cartilage F. Cardiac muscle tissue G. Skeletal muscle H. Nervous tissue A) Epithelial Tissue B) Epithelial Tissue C) Connective Tissue D) Connective Tissue E) Connective Tissue F) Muscular Tissue G) Muscular Tissue H) Unidentified Tissue

Lab 5 Tissues and Skin BIO201L Results and Discussion 1. Describe the cell shape of squamous, cuboidal and columnar epithelial cells. Shape of squamous is flat and have thin scale Cuboid has shape of cube having same hight length and width Columner concsist of taller cells having hight is greater than width and they are elongated 2. List and describe the different types of connective tissue. What similarities and differences did you notice when viewing the prepared slides? Adipose connective tissue consist fat cells which mainly functios to insulate the body Blood is mainly consis of three Cells platelets , red cells and white blood cells They are present in vessels Elastic connective tissue maintains blood pressuer and helps in normal expiration Cartilage are dense connective tissues that are compsoed of chondrocytes Fibrous connective tissue is componet of ecm and is dense connective tissue and it strengthens the deep layers of skin Bone is also dense and supporting connective tissue that helps in body movemtents and posture and internal organ protection consists of osteocytes Similarities and differences that all connective tissue have core but differs in size shape and structure 3. What are the three components of the extracellular matrix in connective tissue? proteoglycans Glycosaminoglycans Collagen fibers 4. What are the three types of cartilage? What are their similarities and differences? Three types of cartilage are elastic, hyaline, fibrocartilage Similarities is that all types have Collagen fibers and are made up of chondrocytes Elastic and hyaline cartilages have perichondrium and fibrocartilages have donot 5. What are the three types of muscular tissue? For each, describe the cell shape, the type of control (voluntary or involuntary) and the presence or absence of striations. Skeletal muscles have straitions and are volutary in action Cardiac muscles have straitions and branched and are involuntary in actions Smooth muscles has absent straitions and are spindle in shape and have involuntary

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