Integration is not decoration — it is a deliberate method for making each unit reach outward into history, reading, and writing first, then into comparative anatomy, ethics, and consequence, so the dissection becomes something a student can think with rather than just perform by rote. Memory is associative: a structure lashed to a discovery, a first description, and a consequence is held by a dozen threads instead of one.
Every unit radiates the same structured set of connections off the specimen spine — three tiers plus a quantitative lane. This is what keeps the cross-domain work rigorous instead of random.
| Tier | What it carries |
|---|---|
| Core spokes always required | History, Reading, Writing. Every unit names who first described the structure or founded the field, gives a real text to read (a primary source like Darwin’s On the Origin of Species or Owen on homology, a biography or living book — not a textbook chapter), and asks for writing in the student’s own voice. These run in every unit, no exceptions. |
| Standard spokes where they fit | Comparative anatomy & classification (how structures line up across species) and history of science (Vesalius and the birth of anatomy, Cuvier founding comparative anatomy, Darwin and common descent). Where a unit genuinely doesn’t carry these, we move them to the elective pool rather than fake a connection. |
| Elective spokes pick ~two of five | Art & anatomical drawing · Ethics · Natural history · Physiology & function · Data & quantitative. Additive depth, never a substitute for the core. Letting students choose feeds wonder and lets faster students go deeper. |
| Applied-math lane always present | Math is not a spoke — we use math, we are not a math program. Dissection leans on measurement and comparison more than most lab work; every unit names the specific math the technique actually requires, done inside the lab context. The per-unit lane is on Page 3. |
Integration is graded as its own strand, separate from the technique-mastery criteria. A student can be Mastered on the dissection and only Approaching on integration, or the reverse — which keeps the skills bar pure while still rewarding cross-domain depth.
Every unit has an anchor built the same way. Each row names the unit’s anatomical big idea and the real-world anchor that carries the History, Reading, and Writing core — a doorway, not a detour.
| Unit | Dissection big idea | Integration anchor |
|---|---|---|
| 01 Tools, Safety & Ethics | Dissection is careful observation under an ethical contract; the tools and technique serve the look, never the other way around. | Vesalius and the birth of modern anatomy (De humani corporis fabrica, 1543) — the shift from copying old authorities to looking for yourself; write on why firsthand observation overturned Galen. |
| 02 Earthworm | A simple segmented body already carries a complete plan — mouth, gut, hearts, and a nerve cord running the length. | Darwin’s last book, on earthworms and the making of soil — read a passage; write on how a “lowly” animal quietly reshapes whole landscapes. |
| 03 Grasshopper | The arthropod plan — exoskeleton, segmentation, jointed limbs — solves the same problems of living with a different design. | The rise of entomology and insects as the most numerous animals on Earth; write on segmentation as a design repeated from the worm outward. |
| 04 Clam or Squid | One mollusk blueprint stretches from the sedentary clam to the fast, sharp-eyed squid. | Cuvier founding comparative anatomy by sorting the animal kingdom into body plans — read on classification by structure; write on what a shared plan reveals. |
| 05 Perch | The vertebrate plan arrives — a backbone, paired fins, a two-chambered heart. | The fish fin as the origin of the tetrapod limb — the forelimb bones begin here; write on the fin-to-limb transition and where the story starts. |
| 06 Frog | The amphibian brings the body onto land — lungs beside a three-chambered heart, limbs built from fins. | The move from water to land in the fossil record (Tiktaalik and its kin); the frog leg carries the same bones as the perch fin — write on homology across the two specimens. |
| 07 Fetal Pig | The mammalian plan mirrors our own — a four-chambered heart, a diaphragm, the familiar layout of organs. | Anatomy taught for centuries through comparison — the pig as a mammal built like us; the ethics of specimen use; write on why the pig teaches human structure. |
| 08 Comparative Anatomy | The same forelimb bones run through fish fin, frog leg, pig trotter, and human hand — homology is evidence of common descent. | Owen coins “homology” (1843); Darwin’s On the Origin of Species (1859) reads the very same bones as evidence of shared ancestry — write the argument from structure to descent. |
Big idea: the same forelimb skeleton — one upper bone, two lower, a wrist, and digits — recurs across wildly different animals. Anchor: Richard Owen named this correspondence “homology” in 1843 and treated it as a shared archetype; sixteen years later Darwin’s On the Origin of Species (1859) read the very same bones as the fingerprint of common descent — one ancestral limb, modified for swimming, hopping, walking, and grasping. Question: students lay the perch fin, frog leg, and pig trotter side by side and map bone to bone. Connection back: this is comparative anatomy — and the observation that turned a catalog of structures into evidence for evolution.
Math never drives a unit, but dissection uses it constantly — always anchored to the specimen and the measurement at the tray. Here is the quantitative skill each unit actually uses, done inside the lab context rather than as a parallel curriculum.
| Unit | Applied math (in the lab context) |
|---|---|
| 01 Tools, Safety & Ethics | Reading instrument scale and grip; unit conversion (mm / cm); estimating incision length and depth before the first cut. |
| 02 Earthworm | Counting segments; measuring total body and gut length; the ratio of gut length to body length. |
| 03 Grasshopper | Tallying body segments and paired appendages; bilateral-symmetry checks; measuring leg and wing lengths. |
| 04 Clam or Squid | Measuring shell or mantle dimensions; symmetry checks; the ratio of arms and tentacles to body length. |
| 05 Perch | Counting fin rays and scale rows; measuring body length and depth; the length-to-depth ratio. |
| 06 Frog | Measuring limb-bone lengths; comparing forelimb-to-hindlimb ratios; counting heart chambers. |
| 07 Fetal Pig | Estimating fetal age from crown-rump length; organ-size ratios; averaging measurements across the group. |
| 08 Comparative Anatomy | Bone-by-bone tallies across species; proportional comparison of homologous limbs; building a simple data table. |
Students count the segments while opening the earthworm, measure the limb bones while comparing the frog and the pig, tally the crown-rump length while staging the fetal pig. The number always means something because it is attached to a specimen they measured — never a worksheet detached from the tray.
Integration is its own strand. Track each unit’s integration level across the year — Not Yet, Approaching, or Mastered — separate from the technique-mastery rubric. Record demonstration tokens earned in the final column.
| Unit | Not Yet | Approaching | Mastered | Tokens |
|---|---|---|---|---|
| 01 Tools, Safety & Ethics | ◯ | ◯ | ◯ | ______ |
| 02 Earthworm | ◯ | ◯ | ◯ | ______ |
| 03 Grasshopper | ◯ | ◯ | ◯ | ______ |
| 04 Clam or Squid | ◯ | ◯ | ◯ | ______ |
| 05 Perch | ◯ | ◯ | ◯ | ______ |
| 06 Frog | ◯ | ◯ | ◯ | ______ |
| 07 Fetal Pig | ◯ | ◯ | ◯ | ______ |
| 08 Comparative Anatomy | ◯ | ◯ | ◯ | ______ |
A student who walks through all eight anchors finishes understanding that dissection is how humans first read the body from the inside, and that every structure on the ladder was once a discovery someone fought to describe — the version of the subject a student keeps.