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