Mammals of The Pliocene Era

Mammals of the pliocene era: warm-blooded, milk-producing animals. Their skin is covered with hair or fur and they are usually viviparous.
Mammoth: enormous, wooly-coated ancestor of the elephant.
Straight-horned bison: enormous ancestor of the bison, with an immense pair of horns.
Sabre-toothed tiger: large fanged predator, ancestor of the tiger.
Wooly rhinoceros: wooly-coated ancestor of the rhinoceros.
Giant short-faced bear: giant ancestor of the brown bear.

Reptiles of The Mesozoic Era

Reptiles of the mesozoic era: cold-blooded vertebrate animals, with or without legs. Their skin is covered with scales and they are usually oviparous.
Brontosaurus: huge herbivorous dinosaur of the mesozoic era.
Stegosaurus: large, heavy herbivorous dinosaur of the mesozoic era, with a body covered with protective armour.
Pterodactyl: large flying dinosaur of the mesozoic era.
Tyrannosaurus: large, tall carnivorous dinosaur of the mesozoic era.

Morphology of An Earthworm

Morphology of an earthworm: small, long, cylindrical animal without legs or hard body parts.
Anus: end of the digestive tract.
Clitellum: projecting girdle used for reproduction.
Segment: one of the rings of an earthworm.
Mouth: entrance to the digestive tract.

Morphology of A Venomous Snake

Morphology of a venomous snake: a limbless, elongated, cylindrical reptile.
Eye: organ of sight of a snake.
Head: foremost part of a snake.
Poison gland. venom-producing gland of a snake.
Neck: part of a snake between the head and the body.
Scale: each of the hard plates covering the body.
Forked tongue: forked organ in the mouth of a snake.
Glottis: opening in the larynx of a snake.
Tooth: organ used to crush food.
Fang: hard organ used to inject the venom of venomous snakes.
Venom canal: tube that carries the venom.
Nostril: nasal opening.

Skeleton of A Crocodile

Skeleton of a crocodile: crocodilian reptile with a broad, short snout, native to the Americas.
Skull: bony case of the brain of a crocodile.
Cervical vertebrae: vertebrae forming the neck.
Thoracic vertebrae: vertebrae forming the dorsal portion of the thoracic cage.
Lumbar vertebrae: vertebrae of the lumbar region.
Sacrum: bone jointed with the ilia to form the pelvis.
Caudal vertebrae: vertebrae of the tail.
Femur: thigh bone.
Tibia: one of the two leg bones.
Fibula: one of the two leg bones.
Tarsus: ankle bone.
Metatarsus: bone forming the part of the foot between the ankle and the toes.
Phalange: each of the small bones forming the toes.
Rib: each of the bones forming the thoracic cage.
Ulna: one of the two bones of the forearm.
Radius: one of the two bones of the forearm.
Humerus: arm bone.
Scapula: shoulder bone.
Mandible: lower jaw.

Morphology of A Cayman

Morphology of a cayman: crocodilian reptile with a broad, short snout, native to the Americas.
Tooth: hard organ of the cayman used for shredding food.
Snout: part of the face of the cayman above the mouth.
Head: foremost part of the cayman, attached to the trunk.
Eye: sight organ of the cayman.
Back: upper part of a cayman's trunk.
Scale: each of the bony plates covering a caiman's body.
Tail: extension of a cayman's spinal column.
Hing leg: rear limb of a cayman.
Toe: digit of the foot.
Nail: nail of the cayman.
Belly: lower part of the trunk.
Front leg: foremost limb of a cayman.
Tongue: organ of taste of a cayman.