Tail fin (পুচ্ছ পাখনা) হচ্ছে মাছের পশ্চাদদেশে অবস্থিত অন্যতম বিজোড় (বেজড়) বা মধ্যগ পাখনা যা চলার সময় সামনের দিকে যাওয়া ও দিক পরিবর্তনে গুরুত্বপূর্ণ ভূমিকা পালন করে থাকে। Tail fin “Caudal fin” নামেও পরিচিত। কিছু ব্যতিক্রম (যেমন শংকর মাছ, যার
Thelyca
Thelyca is a plural form of thelycum. Thelycam is a copulatory organ consisting of modifications of the posterior two, or sometimes three thoracic sternites in female penaeidean shrimps (Such as Asian tiger shrimp, Penaeus monodon) serving as seminal receptacle. It
Thelycum
Thelycum (Plural: thelyca) is a copulatory organ consisting of modifications of the posterior two, or sometimes three thoracic sternites in female penaeidean shrimps (Such as Asian tiger shrimp, Penaeus monodon) serving as seminal receptacle. It looks like an external pocket
Tongue
The tongue is a muscular and movable organ found in the mouth cavity of most of all vertebrates. Numerous taste buds cover the surfaces of the papillae of tongue. Test buds detect different types of taste such as sweet, salty,
Triploid
Triploid means having triple set of chromosomes. It is symbolized by “3x”. Normally fish like eukaryotic organism bears two set of chromosomes in somatic cells and gamete bears single set of chromosomes. The number of a single set of chromosomes
Tunicata
Tunicata is a subphylum of the phylum Chordata. This group is also known as Urochordata. The word Urochordata is formed from Greek word “oura” means “tail” and Latin word “chorda” means “cord”. Animals of the group are treated as Tunicates
Tooth
Tooth (plural: teeth) is a small, hard and whitish outgrowth on the jaw or skin of mouth as well as pharynx of most vertebrates. It is not made of bone. A typical vertebrate’s tooth consists of pulp, dentine, cementum and