Birth to two months. Your newborn has a walking reflex. If she's held in a standing position on a hard surface, her legs will move, as if she's walking. This primitive reflex disappears at around six weeks of age (Sheridan 2014). Three to four months: Your baby can do mini-pushups, which consist of lying on her tummy and raising her head and chest off the ground, using her arms for support (Sheridan 2014).
Editors Contribution (0.00 / 0 votes) Rate this definition: tripod. A piece of equipment and product created and designed in various colors, materials, mechanisms, shapes, sizes and styles, used for a variety of purposes according to the manufacturer product design.
An arthropod (from Greek á¼ÏÎ¸ÏÎ¿Î½ arthron, joint and ÏÎ¿ÏÏ pous, foot) is an invertebrate animal having an exoskeleton (external skeleton), a segmented body, and jointed appendages (paired appendages). Arthropods form the phylum Arthropoda, which includes the insects, arachnids, myriapods, and crustaceans. Arthropods are characterized by their jointed limbs and cuticle made of chitin, often mineralised with calcium carbonate. The arthropod body plan consists of segments, each with a pair of appendages.