Qhov sib txawv tseem ceeb ntawm pinacoderm thiab choanoderm yog qhov pinacoderm yog cov tawv nqaij sab nraud lossis txheej txheej txheej txheej txheej sab nrauv uas muaj cov pinacocytes, uas yog cov cell zoo li phaj. Nyob rau hauv sib piv, choanoderm yog lub cev innermost txheej los yog puab nto tsim ntawm choanocytes, uas yog flagellated hlwb.
Sponges yog qhov yooj yim invertebrates belongs rau Phylum Porifera. Lawv yog cov sessile metazoans uas yog cov tsiaj txhu uas tsis muaj cellular. Tsis tas li ntawd, muaj kwv yees li 5,000 hom kab mob nyob, thiab lawv muaj qhov tshwj xeeb pub mis. Lawv nqus dej los ntawm cov pores me me hauv lawv lub cev phab ntsa. Yog li ntawd, lawv muaj lub cev tag nrho ntawm qhov hws thiab cov channel, tso cai rau dej ntws los ntawm lawv. Lawv tuav cov dej ntws tsis tu ncua thiab tso siab rau nws kom tau txais lawv cov zaub mov. Lub cev ntawm daim txhuam cev yog qhov khoob thiab muaj ntau hom cell nrog rau ob hom tseem ceeb: pinacocytes, choanocytes. Pinacocytes tsim cov tawv nqaij sab nraud hu ua pinacoderm thaum choanocytes tsim lub puab nto hu ua choanoderm.
Pinacoderm yog dab tsi?
Pinacoderm yog txheej txheej sab nraud ntawm lub cev ntawm daim txhuam cev. Nws yog tsim los ntawm cov phaj zoo li los yog flattened hlwb hu ua pinacocytes. Pinacoderm yog sib npaug rau cov epidermis ntawm lwm yam tsiaj. Yog li ntawd, nws ua raws li cov tawv nqaij sab nraud los yog saum npoo ntawm daim txhuam cev. Pinacocytes tsis muaj flagella. Lawv muab tso rau hauv ib txheej.
Daim duab 01: Daim txhuam cev
Zoo ib yam li lwm cov hlwb, pinacocytes kuj zom cov zaub mov. Structurally, pinacocytes yog nyias thiab dav hlwb uas yog nucleated. Lawv tsim ib daim ntawv squamous. Hauv daim txhuam cev, muaj rau ntau hom pinacocytes; Lawv yog cov exopinacocytes, endopinacocytes, basopinacocytes, prosopinacocytes, thiab apopinacocytes.
Choanoderm yog dab tsi?
Choanoderm yog cov txheej sab hauv tshaj plaws ntawm cov ntaub so ntswg zoo li cov ntaub so ntswg. Nws ua raws li sab hauv los yog gastral epidermis. Choanoderm yog tsim los ntawm flagellated dab tshos hlwb hu ua choanocytes. Zoo ib yam li pinacoderm, choanoderms kuj yog ib txheej ntawm tes. Muaj foldings nyob rau hauv lub choanoderm, uas tso cai rau tsim ntawm spherical chamber. Choanocytes kab cov kab no.
Daim duab 02: Choanocytes
Choanocytes yog siv los tsav lawv cov dej ntws thiab ntes feem ntau ntawm lawv cov zaub mov. Cov hlwb no ntes cov khoom noj los ntawm lawv qhov chaw basal thiab los ntawm thaj chaw apical ze ntawm dab tshos.
Dab tsi yog qhov zoo sib xws ntawm Pinacoderm thiab Choanoderm?
- Pinacoderm thiab choanoderm yog ob hom epithelial zoo li txheej ntawm daim txhuam cev.
- Lawv muaj cov cell nucleated.
- Ob lub xovtooj ntawm tes tau koom nrog hauv kev pub mis ntawm daim txhuam cev.
Qhov txawv ntawm Pinacoderm thiab Choanoderm yog dab tsi?
Pinacoderm thiab choanoderm yog ob qhov chaw zoo li epithelial ntawm daim txhuam cev. Pinacoderm yog cov tawv nqaij sab nraud ntawm daim txhuam cev, thaum choanoderm yog qhov chaw sab hauv ntawm daim txhuam cev. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm pinacoderm thiab choanoderm. Tsis tas li ntawd, pinacocytes tsim cov pinacoderm, thaum choanocytes tsim cov choanoderm.
Ntxiv mus, pinacocytes yog cov hlwb flattened tsis muaj flagella, thaum choanocytes yog flagellated dab tshos hlwb. Dhau li ntawm cov no, qhov sib txawv ntawm pinacoderm thiab choanoderm yog qhov pinacoderm kab sab nraud ntawm daim txhuam cev, thaum lub choanoderm kab ntawm sab hauv ntawm daim txhuam cev.
Summary – Pinacoderm vs Choanoderm
Pinacoderm yog txheej txheej epithelial ntawm flattened hlwb hu ua pinacocytes. Nws yog txheej txheej ntawm tes los yog sab nraud ntawm daim tawv nqaij ntawm daim txhuam cev. Hauv qhov sib piv, choanoderm yog cov txheej txheem ntawm tes sab hauv tsim los ntawm cov cell tshwj xeeb hu ua choanocytes. Yog li ntawd, pinacoderm yog lub dermal epidermis thaum choanoderm yog lub gastral epidermis ntawm daim txhuam cev. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm pinacoderm thiab choanoderm. Ob leeg pinacocytes thiab choanocytes tau koom nrog hauv kev nqus dej rau hauv lawv thiab txhawb kev noj zaub mov.
