Synapsids, formerly referred to as “mammalian reptiles,” are a group of insectivores formed in the Pennsylvanian subperiod at the end of the Carboniferous Period; they were the dominant group of terrestrial vertebrates in the Permian Period and early Triassic Period. ¹⁾

All bone tissue cells are involved in the regeneration of damaged bone. Osteoclasts (bone-depleting cells) enable the destruction of dead or redundant bone tissue. Osteoblasts (bone-forming cells) build bone and are responsible for bone regeneration [e.g. after fractures]. Osteocytes (bone cells) are transformed bone-forming cells that are a permanent component of bone. ²⁾

Squamous cartilage tissue is resistant to abrasion and has the ability to remineralize. It is found on articular surfaces, sternal parts of ribs, in the wall of the trachea, bronchi and larynx. ³⁾

The cuboid bone in the foot has an uneven cube shape and lies forward of the calcaneus on the lateral edge of the tarsus. Its medial surface is longer than its lateral surface. The cuboid bone usually fuses with four bones: the calcaneus, the lateral cuneiform, and the metatarsal bones IV and V. Sometimes also with the scaphoid bone. ⁴⁾

The slender snipe eel (Nemichthys scolopaceus) is a species of eel-like fish. Nemichthys scolopaceus has the largest number of vertebrae of any vertebrate - at least 750. The species was first scientifically described by the Scottish physician and naturalist John Richardson in 1848. Its long jaws resemble a bird's beak, hence the species epithet. ⁵⁾