What is around a rat's eyes? - briefly
The region encircling a rat’s eyes consists of dense fur, a thin skin layer, and the orbital bones that shield the ocular cavity. Adjacent structures include whisker pads (vibrissae), eyelids with associated glands, and the nasolacrimal duct that drains tears.
What is around a rat's eyes? - in detail
The ocular area of a rat is encircled by several distinct anatomical features. Dense fur covers the surrounding skin, providing insulation and camouflage. Adjacent to the eye, a band of specialized skin houses vibrissae (whisker) follicles that serve as tactile sensors. The upper and lower eyelids consist of thin, pliable tissue; the upper lid includes a nictitating membrane that slides horizontally to protect the eye while maintaining visual clarity.
- Orbital bone forms a rigid cage that anchors the globe.
- Extraocular muscles (rectus and oblique groups) attach to the sclera, enabling precise eye movements.
- Lacrimal gland, located in the orbital cavity, secretes tear fluid to lubricate the cornea.
- A network of arterial and venous vessels supplies oxygenated blood and removes metabolic waste.
- Sensory nerves, primarily branches of the trigeminal nerve, transmit tactile and pain signals from the peri‑ocular region.
These components collectively maintain ocular protection, facilitate sensory input, and support the mechanical stability required for visual function.