Flashcards
primates
Cards in this deck (22)
- 1Classification of PrimatesPhylum- Chordata
Sub Phylum- Vertebrata
Class- Mammalia
Order- Primates - 2Sub Phylum VertebrataEmbryonic notochord
Nerve cord
Embryonic gill slits
Postanal tail - 3Class MammaliaHair over body
Homiothermic
Four chambered heart
Young develop within uterus
Feed young on milk from mammary glands - 4Characteristics of PrimatesUnspecialised mammalian body
Unspecialised limbs
Nails instead of claws
Ridges of hands
Forward facing eyes
Rods (dim light) and cones (colour vision)
Brain development
Cerebral cortex progressively increasing in size
Four incisors in each jaw for biting
Rhythmical sexual cycle but usually only one offspring per pregnancy - 5Unspecialised mammalian bodyAncestors were arboreal (living in trees)
- 6Unspecialised limbsAllow for diversity of use
Pentadactyl (5 digits)
Opposable first digit - 7Nails instead of claws Ridges of handsFingerprints to allow better grip
Needed for grasping as their hands and feet are prehensile - 8Forward facing eyesAllows for 3-D vision because the lines of sight from each eye overlap
Better for judging distances when jumping through trees - 9Brain developmentReduced olfaction (sense of smell)
- 10Cerebral cortex progressively increasing in sizeFor higher functions of vision, memory, reasoning
- 11Four incisors in each jaw for bitingCanines, premolars and molars
- 12Classified into suborders- Prosimians
Lemurs & Lorises
- Tarsiers
- Anthropoids
Old World Monkeys
New World Monkeys
Apes
Humans - 13Prosimians have ... compared to AnthropoidsSmaller brains
Larger snouts
Less efficient reproductive systems
Less manipulative with hands
Very diverse showing a range of adaptations - 14AnthropoidsHuman-like primates
Large brain, flat face, fully forward eyes, manipulative hands
Include:
New world monkeys
Old world monkeys
Apes
Humans - 15Apes vs MonkeysBody size
Brain size
Brain convolutions
Teeth
Locomotion
Limbs
Posture - 16body sizeLarger than monkeys
Gorilla is largest ape - 17Brain sizeLarger brains than monkeys
Cranial growth to accommodate brain - 18Brain convolutionsFolds in brain give ape brain larger surface area
- 19TeethFive cusped molars
- 20LocomotionQuadrupedal vs brachiation
- 21LimbsApe arms are shorter due to reduced brachiation
- 22PostureSemi erect posture
Reorientation of bones such as scapula
Information
- Description
- human bio Flashcards on primates , created by aimee g on 10/08/2016.
- Created by
- aimee g · Aug 2016
- Updated
- Aug 23, 2016
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