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7M Science
• Lungs:
• Digestive
• Circulatory
We both have 2 lungs used for
We both have a mouth, esophagus,
stomach, pancreas, liver, gall bladder,
small intestine, and large intestine.
We both have arteries, capillaries,
veins, blood, and a heart
• Brains:
Although we both have brains, ours is more
• Skeletons:
We both have a skeleton that provides a
framework for our bodies, protects our
internal organs, and allow us to move.
• Muscles and
We both have these tissues that hold our
skeletons together.
• Body Configuration: A frog’s heart, lungs, and digestive systems are all
found in one single hollow space. Our internal organs
are housed in three distinct cavities: chest, abdomen,
and pelvis.
• Respiratory System: Frogs breathe through their skin. Known as “cutaneous
respiration”, this process allows oxygen to pass
through the skin and directly into the bloodstream.
Frogs also have neither ribs or diaphragms; body
parts that help humans breathe. And, their chest
muscles are not used for breathing.
• Reproductive
Although both humans and frogs produce eggs, frog
eggs are fertilized externally. Also, reproductive
organs are housed internally in both males and
• Skeletal
Frogs have 1 forearm and 1 lower leg
bone, while we have 2. Frogs lack
several vertebrae and do not have a
pelvis. They also have structures not
found in the human skeleton i.e. the
• Circulatory
A frog has a 3 chambered heart (2
upper chambers (atria) and only 1
lower chamber) compared to the 4
chambered heart a human has.
• Nictitating
A clear, retractable membrane that protects each eye.
• Tympanic
A circular eardrum located behind each eye.
• Eustachian Tube:
Tube that connects the middle ear to the mouth, aka
the buccal cavity.
• Mucous Glands:
Located in the skin, these glands secrete mucous to
keep the skin moist.
• Granular Glands:
Glands that secrete sticky, bitter substances to make
amphibians unattractive to predators.
• Vomerine
Two rough pads on the roof of the mouth
used to hold prey.
• Cloaca:
A cavity that collects materials from
intestines, urinary bladder, and
reproductive organs.
• Glottis:
A slit-like opening from the throat to the
lungs that plays an important role in
• Gills:
Structures that help amphibians breathe
while they are tadpoles.