Connective Tissue Wrappings & Attachments of Skeletal Muscle

• Tendons—cord-like structures

• Mostly collagen fibers• Attach muscle belly to bone

Figure 6.1

Connective Tissue Wrappings & Attachments of Skeletal Muscle

• Cells are surrounded & bundled by connective tissue• Fascia—tough connective tissue, outside of the epimysium of the

muscle belly, that creates a 3-D web around every muscle

Figure 6.1

Connective Tissue Wrappings & Attachments of Skeletal Muscle

• Cells are surrounded & bundled by connective tissue

• Epimysium—covers the entire skeletal muscle (muscle belly)

Figure 6.1

Connective Tissue Wrappings & Attachments of Skeletal Muscle

• Cells are surrounded & bundled by connective tissue

• Perimysium—wraps around a fascicle (bundle) of muscle fibers

Figure 6.1

Connective Tissue Wrappings & Attachments of Skeletal Muscle

• Cells are surrounded & bundled by connective tissue

• Endomysium—encloses a single muscle fiber

Figure 6.1

Microscopic Anatomy of Skeletal Muscle

• Sarcolemma—specialized plasma membrane that surrounds a myofibril

• Myofibrils—long organelles inside muscle cell

REVIEW of SKELETAL MUSCLE STRUCTURE:Play Doh Model Challenge

• Using the 4 colors of modeling clay, develop a mini replica of skeletal muscle, including…

• 1 muscle belly• At least 3 fascicles• At least 3 muscle fibers within each fascicle• At least 3 myofibrils within each muscle fiber

Muscle bellyFascicles

Muscle fibers

Myofibrils

Per. 1 - The end

REVIEW of SKELETAL MUSCLE STRUCTURE:Play Doh Model Challenge

• Follow Up Questions:• Which colors did you use to represent each structure?

• Which structure did you construct first? Explain why you did this

• Which part of the muscle wrapping was the most complicated to build? Explain your answer

• Draw and color your muscle structure and include labeling of the wrappings and their functions

Muscle belly

Fascicles Muscle fibers

Myofibrils

Per. 1 - The end

Week #6 (11/16-11/20) Warm Up – Fri, 11/20:- Review of Muscle #2 & Muscle organization

Pick up:Skeletal Muscle CrosswordTextbookHave out:Mr. Muscle ManMuscle Structure diagram

Agenda:1. Muscular System Latin Quiz2. Skeletal Muscle Crossword Puzzle due

Monday 11/23

Homework:1. Muscles Quiz #2

(Identification) – Mon, 11/23

2. Muscular Sys. Rev. packet – Wed, 11/25

3. Muscle System Quiz #1 (Structure, Function & Organization) – Mon, 11/30

Anatomy Fun Fact:As the body gets cold, heat is generated due to shivering which causes rapid muscle contractions.

Learning Goal: I will be able to describe the structure & function of the Muscular System.

Skeletal Muscle OrganizationName the following structures & connective tissue wrappings of skeletal muscle.

A

B (structure) C

(wrapping)

D (structure)

E (wrapping)

F (structure)

G (wrapping)

H (structure)

I (wrapping of H)

National Geographic: Bionics• QUIETLY read the article “Bionics”.• Annotate the article as you please (symbols, writing in

margins, highlighting).• Prompt: “We are giving people tools. They are better

than what previously existed. But they are still crude, like a hammer, compared with the complexity of the human body. They can’t hold a candle to Mother Nature.”

– Using your knowledge of the interdependence of organ systems in the human body & how skeletal muscle is organized & using direct information about bionics in the article, discuss why this quote is so truthful.

– 3-paragraph response (opening, body, closing)

• STAPLE your annotated article to your written response & turn in to the Hmwk Bin!

– DUE by the END of the PERIOD TODAY!

Per. 3 – needs; go over WU & collect, The end Bionics Photo Gallery