Scientific Illustration

jimmysketchbook:

Some more sketchbook studies… I fell a little behind on posting stuff the last few weeks, but these were two of the pages I think came out pretty cool. Hope you guys think so too! 

biomedicalephemera:

Limbs of the Cephalopoda

Whether squids, octopuses, and nautilus have “arms” or “tentacles” is often simply a matter of semantics, but the most accepted definitions (from what I’ve found) tend to define the “arm” as a tapered limb, with two rows of suckers along its entire length. “Tentacle” is typically a length of tapered limb with no suckers, leading to a distal club-like appendage, covered in suckers.

One exception would be limbs in the nautilus - they have up to 90 un-suckered limbs, but their limbs are called “tentacles” by those who study them, even without the terminal club.

Images:
Top right: Octopus vulgaris and detail of beak and arms
Top left: Detail of tenticular clubs in squid, from the Expedition of the Valdivia
Bottom right: Arm of Illex illecebrosis (Northern Shortfin Squid)
Bottom left: Tentacle of Illex illecebrosis

Dissection of the neck, shoulder and axilla.

By Joseph Maclise

Dissection of the neck, shoulder and axilla, deep dissection, shown in 2 numbered illustrations. 1 illustration showing thoracic and shoulder muscles divided to show brachiocephalic vein, axillary artery, brachial plexus, and axillary lymph nodes. Male cadaver, in vivo, anterior view. 1 illustration of dissection of axilla shown in isolation, showing brachiocephalic veins, axillary artery and axillary lymph nodes. Anterior view.

General: Plate signed with the artist’s monogram JM [Joseph Maclise]; printed by M. & N. Hanhart.

(via fyeahanatomy)

itgivesitthew:

Well, that explains a bit. Sort of.

(via anaestheticroom)

crepacuore:

Why bother anyway?

(via anaestheticroom)

xmorganaartx:

Shoulder - Posterior view by ~Thiago-NB

peaches1xart:

Anatomy drawing practice

Anatomy study 2 - arm muscles by *str4yk1tt3n

Thanks for the submission older-and-far-away

skullandbone:

arm/wing comparison and evolution