Blood,cartilage, bone Layers of tissues that protects, helps in diffusion Skeletal smooth and cardiac neurons are excitable initiate transmit and receive impulses while neurolgia are non excitable provide structural and functional support

let's go through your answers:

1. Connective tissue: You correctly identified blood, cartilage, and bone. To be complete, you could also include connective tissue proper (like loose and dense connective tissue).
2. Epithelial tissue: ✅ Correct! Its primary functions include forming protective layers, secretion, absorption, and aiding in diffusion.
3. Muscle tissue: ✅ Correct! The three types are skeletal, smooth, and cardiac.
   • Skeletal muscle is found attached to bones, responsible for voluntary movement.
   • Smooth muscle is found in the walls of internal organs (like the digestive tract and blood vessels), responsible for involuntary movements.
   • Cardiac muscle is found only in the heart, responsible for pumping blood.
4. Neurons and neuroglia: ✅ Correct! Neurons are the excitable cells that transmit electrical signals, while neuroglia (or glial cells) are non-excitable cells that provide support, protection, and nourishment to neurons.