The comic · Human Anatomy & Physiology (HAP)

Week 5 of 17

FEBRUARY 19 TO 24

Fiction. No real student, family or grade appears.

Drawing, panel 22: Bioethics: performance enhancement.

Should athletes be allowed drugs that build muscle faster? I said no and got asked why training at altitude is fine but a drug is not, since both are deliberate manipulation of physiology.

Panel 22Bioethics: performance enhancement · 2027-02-19
Drawing, panel 23: Sarcomere and contraction.

The sarcomere. Actin and myosin, Z-lines, A-band, I-band, and the sliding filament model.

Panel 23Sarcomere and contraction
Drawing, panel 24: Maniken muscle build.

This is the one people told me about. You roll actual clay muscles and place them on a skeleton model, in anatomical order, from origin to insertion.

PARTNER

That muscle is on backwards. The action you just described would be impossible.

Panel 24Maniken muscle build · 2027-02-23
Drawing, panel 25: Muscle action analysis.

Agonist, antagonist, synergist. Nothing in the body moves by one muscle contracting. One pulls, one resists, others stabilize, and the resistance is what makes the movement controlled instead of a spasm.

Panel 25Muscle action analysis · 2027-02-24
Drawing, panel 26: Submit muscle evidence.

Sarcomere diagram, Maniken photos, muscle pair analysis. The packet works across scales, from filaments sliding to a whole joint moving, which is the point of the week.

Panel 26Submit muscle evidence
Week 4Week 6