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What are the external parts of a frog?
The external anatomy includes both the dorsal and ventral sides, forelimbs and powerful hind limbs for swimming. The head contains dorsal eyes for sight and tympanic membranes for hearing. The internal anatomy can be divided into body systems.
What is the head of the frog?
The head of a frog is triangular in shape with a blunt snout. The eyes of a frog have a nictitating membrane that gives protection when the frog is in water. On the sides of the eyes, a membranous tympanum (ear) is present that receives the sound signals. A frog has two forelimbs and two hind limbs.
Where is the head on a frog?
Head: uppermost part of a frog. Trunk: central part of a frog, to which are attached the head and limbs.
What is Nictitating membrane in frog?
In frogs and birds, the nictitating membrane is a human vestigial organ. It guards the eye. The third eyelid, i.e. the nictitating membrane covers the frog’s eyes. In red-eyed frogs, the nictitating membrane looks like stripes of a tiger that cover the red-eyeball and provide a good view.
What feature allows frogs to receive sound?
Their eardrum works like a regular eardrum with one very special adaptation…it is actually connected to their lungs. The lungs vibrate and are almost as sensitive to hearing as the eardrum. This allows frogs to make really loud sounds without hurting their own eardrums!
What directs sound waves from the external environment to the ear?
The outer ear directs sound waves from the external environment to the tympanic membrane. The auricle, the visible portion of the outer ear, collects sound waves and, with the concha, the cavity at the entrance to the external auditory canal, helps to funnel sound into the canal. Because of its small size and virtual immobility,
How does the tympanic membrane absorb sound waves?
When the tympanic membrane absorbs sound waves, its central portion, the umbo, vibrates as a stiff cone, bending inward and outward. The greater the force of the sound waves, the greater the deflection of the membrane and the louder the sound.
What is the passage of vibrations through the air across middle ear?
The passage of vibrations through the air across the middle ear from the tympanic membrane to the round window is of negligible importance.
What parts of the brain do frogs have?
Spinal Nerves – Nerves that lead to and from the spinal cord Olfactory Lobe – Part of the frog’s brain associated with the sense of smell Cerebrum – Part of the brain that is associated with memory, pain, and voluntary muscle control. Optic Lobes – Part of the brain associated with vision.