trabeculae
The nail matrix forms the nail and lies beneath the lunule.
compact bone tissue and spongy bone tissue
Sea arches and seastacks
Arrangements fall under few categories such as principle compressive group, secondary compressive group, principle tensile group, and sometimes a greater trochanter group. These groups specifically describe the orientation of trabeculae in spongy bone. They resemble lines of symmetry or fibers that extend vertically or transversally. A picture will help!
pins
The sea first forms sea caves then sea arches then sea stacks and finally it forms sea stumps which will eventually disappear.
Dot matrix printers
Pumice is a light and spongy rock that forms from lava that is highly frothy with gas bubbles. It is often used in beauty treatments and horticulture due to its porous nature.
The plural forms for the noun matrix are matrices and matrixes, both are accepted.
Collagen is the fibrous protein that forms the matrix of skin, ligaments, tendons, and bones. It provides structural support and strength to these tissues.
Laccolith
Spongy bone is the tissue that makes up the interior of bones; compact bone is the tissue that forms the surface of bones. In long bones, spongy bone forms the interior of the epiphyses; the diaphysis (shaft) consists of compact bone surrounding the central marrow cavity. Spongy bone can also be found in the rib slide (21). It contains large marrow spaces defined by shelves and spicules of bone. The inner space is lined by osteoblasts and osteoclasts (called the endosteum). Osteocytes can be seen in layers in adult spongy bone. Outside all of bone, is a connective tissue sheath called the periosteum. It contains inner layers of osteogenic cells that can give rise to osteoblasts and make new bone,.