Uninzi lwezilwanyana luhlala kuhlobo olunye lwe-environment kuba kuzezona zingqinelana nazo. Sithi zi-'adapted' kwi-environment'. Umzekelo, izilwanyana ezifana namasele, ii-newts, namadada, zinoobhaxa beenyawo ezizinceda zitsho zikwazi ukudada emanzini. Ziziintlobo ngeentlobo ke ii-habitats kwaye zikwaziintlobo-ntlobo iindawo ezikwazi ukuphila kuzo.

I-Pitoli yathi yafunyanwa ngo-1855 nguMarthinus Wessel Pretorius. Wayeyinkokheli yeVoortrekkers. U-Pretoruis wathiywa eligama ngoyise owayenguAndries Pretorius. U-Andries Pretorius wabaligorha leVoortrekkers emva kwedabi elalibizwa ngokuba yiBattle of Blood River. Esi sixeko saba ngundlunkulu werhiphabhlikhi yaseMzantsi Afrika ngomhla woku-1 kaCanzibe, ngo-1860.

Imithambo yegazi esebenza njengomzila okanye indlela yegazi eliphuma entliziyweni ibizwa ngokuba ngoo-nothumela. Aba nothumela ke baya bencipha ngokuya bebhekela beyishiya intliziyo. Bathi ke bakubabancinane ngokugqibeleleyo bajike ngoku babe zii-arterioles. Xa bezii-arterioles kulapho bathi baxhumane khona nemithanjana yomzimba ebizwa ngokuba zii-cappilaries.

Igazi lingamanz’ abomvu asemizimbeni yabantu nakwimizimba yezilwanyana. Igazi lityhalwa zizinto ezincinane kakhulu eziphilayo neziqumbene ndawoninye ezikhutshwa yintliziyo, ngeenjongo zokokuba igazi lizise izakha-mzimba kunye nomoya ococekileyo kwizihlunu zemizimba yethu. Ikwaligazi eligutyula konke ukungcola okuvela emzimbeni kunye nomoya ongcolileyo, lowo uvela emzimbeni ngamanye amazwi.

Akuzizo zonke ii-metals ezinezi mpawu. I-Lead, umzekelo, ithambe kakhulu, kwaye ubushushu nombane azikwazi kugqitha kwi-iron njengoko zisenza kwi-copper.

Izidlwengu nabaxhaphazi babantwana batsalwa ngumnqweno wesondo kubantwana bethu kwaye bafumana ukwaneliseka kwizenzo zabo. Basoloko behenda abantwana bethu ngokubanika isihoyo nezipho – oku kubizwa ngokuba lugegesho. Kukwakho naloo marhamncwa alimaza abantwana bethu kuba bekhuthazwa ubukhulu becalangamandla abanawo ngaphezu kweemfuno zesondo. Kukwakho nabo benzakalisa abantwana bethu ngoburheletya nokuhenyuzisa abantwana kuba befumana inzuzo eyimali. La marhamncwa oku akwenza kuba kwiimeko ezininzi enamandla okulawula abantwana bethu kwaye banawo amathuba kwaneendawo zabucala ezivumela ezi zenzo. Kufuneka ibe lubizo lomntu wonke onomntwana okanye owazi umntwana, ukuba kususwe amathuba, ubomi babucala obuvumela izenzo ezibi, amandla kwanolawulo lwala marhamncwa. Izidlwengu nabaxhaphazi babantwana bakhangela amathuba okuxhaphaza abantwana bethu – banakho nokuwaqulunqa la mathuba – kwiindawo zabo zabucala abazikhethele zona, ngexesha labo nongokuthanda kwabo. Kufuneka siqinisekise ukuba siyazazi iimeko nezimo ezifumanekayo nesinokuzikhangela kubantu abanokuxhaphaza abantwana bethu ngokwesondo. Kubalulekile ukwazi ukuba la marhamncwa ngabakhohlisis. Bayakwazi ukukuxelela nantoni na ukuze ukholelwe kubo kwaye ubaxhase koko bakuxelela kona. Bakujonga ngqo emehlweni bakwenze ukholelwe ukuba iinjongo zabo zezilungileyo.