... reptilian elements into inner ear ossicles.
... 3. Reptiles don’t use metabolism to regulate body temperature;
they are ectotherms. Ectotherms absorb external heat (i.e.
sunlight) Reptiles are able to survive on about 10% of
calories required by mammals.
4. Oldest reptiles are from the late Carboniferous (about 300
million years ago) dinosaur ...
CH 32 Foldable Mammals Internal content
... 2-Ability to nourish young with milk
(In female mammals, MAMMARY
GLANDS produce milk for the young)
4-Have 4-chambered hearts
5-Are Endotherms (generate their body
View/Open - Smithsonian Institution
... Parareptilia represents an entirely extinct group of early
reptiles that were once considered closely related to turtles
(Tsuji and Müller, 2009). They ranged in time from the end of
the Carboniferous to the end of the Triassic. Some parareptiles
have openings behind the eye socket in the cranium bu ...
Characteristics of Mammals
... • Primates have opposable thumbs to grasp
• Bats have front limbs that are modified into
• Mammals front limbs are adapted for a variety
of methods of food gathering
Chapter 18: The Chordates
... The most primitive craniates are the hagfish and lampreys. Both maintain the notochord, but in lampreys, other
rudimentary vertebral structures are present.
Present day hagfish (40 species) scavenge on the seafloor. While nearly blind, they have an excellent sense of
smell. They feed by grasping ...
... B. homeostasis - the process of maintaining a constant internal environment.
Vertebrate bodies are designed with specialized systems to help them do this:
1. nervous system - communication and integration of senses
2. endocrine system - chemical communication (hormones) that
regulate growth, levels ...
... 5. Organs of corti contain receptor cells (hair cells) that
deform from vibrations
6. Impulses sent to the vestibulocochlear nerve
7. Auditory cortex of the temporal lobe interprets sensory
... Resource Sheet
Screener for hearing loss in children
Knowing all children’s history of ear infections can identify “at risk” children. The following
information should be collected in order to identify and substantiate conductive hearing loss as a
significant factor in literacy problems.
Hearing loss could signal other issues by Carey Rivinius, FNP
... If sudden hearing loss is caught early enough, it can be reversible, depending on the
cause of the hearing loss. Possible treatment may include a course of steroids and
other medications. Further diagnostic testing such as MRI may also be required. It is
crucial to have it evaluated to determine the ...
Lions, Tigers, and Bears…
... • Body hair
• Differentiated teeth
• Infant dependency
• Constant internal temperature
• Mammary glands
• Well-developed brain
• Internal development
... • 1. Many toads have lumps behind their
eyes that contain poison that oozes out
when they are attacked.
• 2. Skin◊ Frogs are moist and smooth
◊ Toads are dry and bumpy
Senses - Raleigh Charter High School
... How does our brain distinguish pitches? Two complementary theories:
1. ________________ theory – the basilar membrane ______________ at the same frequency as the sound
waves; sound waves of higher frequency cause more ________________ action potentials which the brain
interprets as a _______________ ...
Other Characteristics Shared by Mammals
... Hair and Mammary Glands
● two characteristics that distinguish mammals from other
mammary glands: glandular tissue that produce and secrete
milk that nourishes developing young
REPTILES AND BIRDS
... the embryo and a leathery shell to
protect and prevent liquids from leaving
Phylum Chordata - El Camino College
... 6. Reptiles developed the amniotic egg and became 1st true land vertebrates. Amnion is a fluid filled sac and protects
embryo from desiccation (drying up) on land. This eliminated the need of external water, like amphibians, for
fertilization. They have scales on skin to prevent water loss, and also ...
... explanation of the
critical period theory
discussed in Module 19
9/25 SI A Ecl 365 Test Review 1. Name 4 characteristics of a
... 83. Compare and contrast endochondral and membranous bones.
e-replace cartilage, ossified, most common. M-no precursor, facial, cranium
84. T/F Turtles have an exoskeleton. F pseudoexoskeleton
85. What are the functions of the skeletal system? Support, muscle attachment, protection
86. T/F bone is a ...
Evolution of mammalian auditory ossicles
The evolution of mammalian auditory ossicles is one of the most well-documented and important evolutionary events, demonstrating both numerous transitional forms as well as an excellent example of exaptation, the re-purposing of existing structures during evolution.In reptiles, the eardrum is connected to the inner ear via a single bone, the columella, while the upper and lower jaws contain several bones not found in mammals. Over the course of the evolution of mammals, one lower and one upper jaw bone (the articular and quadrate) lost their purpose in the jaw joint and were put to new use in the middle ear, connecting to the stapes and forming a chain of three bones (collectively called the ossicles) which transmit sounds more efficiently and allow more acute hearing. In mammals, these three bones are known as the malleus, incus, and stapes (hammer, anvil, and stirrup respectively).The evidence that the malleus and incus are homologous to the reptilian articular and quadrate was originally embryological, and since this discovery an abundance of transitional fossils has both supported the conclusion and given a detailed history of the transition. The evolution of the stapes was an earlier and distinct event.