Thorn of a Plant: a small sharp-pointed tip resembling a spike on a stem or leaf
Tendril of a Plant: a slender elongated thread-like organ which may cling to objects for support.
Stem - Herbaceous: plant stems that are soft and green and that usually do not grow taller than two meters.
Arthropod: Any member of a large phylum of invertebrate animals with jointed legs and a segmented body, such as spiders ...
Animal that has a segmented body: Ants have an elongated and segmented body.