Which type of endings in the skin transmit sensations to the brain?

The correct answer is nerve endings. Nerve endings in the skin play a crucial role in transmitting sensory information from the external environment to the brain. These specialized structures, known as sensory receptors, respond to various stimuli such as touch, temperature, pain, and pressure.

When activated, these nerve endings convert the physical stimuli into electrical signals, which are then conducted through nerve fibers to the spinal cord and ultimately to the brain for interpretation. This process is fundamental to our ability to perceive and react to our surroundings.

In contrast, cell, muscle, and blood do not have the primary function of transmitting sensory information from the skin to the brain. Cells in the skin, such as keratinocytes, are primarily involved in protection and barrier functions. Muscle tissue is responsible for movement and does not serve as a sensory receptor. Blood is essential for transporting nutrients and oxygen throughout the body but is not involved in sensation transmission from the skin. Thus, nerve endings are specifically designed for this sensory role, making them the correct choice.